SINN 903 Pilot Watches Navigation Chronograph Instruction Manual

SINN 903 Pilot Watches Navigation Chronograph

Product Information

SINN Spezialuhren is known for producing high-quality watches with a focus on functionality, performance, resilience, and durability. The watches are designed with the necessary technical features and undergo rigorous testing and certification processes to ensure reliability in various environments.

Specifications:

• Model: Series 903
• Technical Features: Protection from magnetic fields, scratch resistance
• Water Resistance Certification: Tested and certified by DNV

Product Usage Instructions:

1. General Usage:
   Ensure that you understand the specific features of your Series 903 watch and how to operate them.

2. Water Resistance:
   As the watch is water-resistant, you can wear it while swimming or diving. However, avoid pressing any buttons while underwater to maintain the water resistance integrity.

3. Magnetic Field Protection:
   The watch is designed to protect against magnetic fields. Avoid placing the watch near strong magnetic sources to prevent interference with its functioning.

4. Scratch Resistance:
   The watch face is scratch-resistant, but it is advisable to avoid rough handling or contact with abrasive surfaces to maintain its appearance.

FAQ:

• Q: How do I ensure the water resistance of my watch?
  A: Make sure the crown is fully pushed in and screwed down to maintain water resistance. Regularly check the gaskets for any signs of wear and have them replaced by a professional if needed.

• Q: Can I wear my Series 903 watch in extreme temperatures?
  A: The watch is designed to withstand a range of temperatures, but it is advisable to avoid extreme temperature fluctuations to ensure optimal performance.

INTRODUCTION

DEAR CUSTOMERS,
We know from numerous conversations that the people who buy our watches do so out of conviction. This includes people with a pronounced affinity to technology who are fascinated, for example, by the solutions we have devised for protection from magnetic fields and scratch resistance. Some of our customers, such as divers, pilots, and the German GSG 9 special police unit, rely on their watches in their respective careers because their lives depend on it. They all swear by the performance, resilience, and durability, as well as the quality and precision of our watches. That is why the world’s largest classification society DNV regularly tests and certifies the water and pressure resistance of our diving watches.

Selected pilot watches are tested and certified by independent institutions according to the DIN 8330 Horology – Aviator watches in an extensive and complex type and unit verification process. This ensures that a DIN 8330-compliant pilot watch is a suitable all-around replacement for the onboard timekeeping instruments available to pilots.

Functionality is our top priority and ultimately determines the design. Only the technical features that are needed can be found on our watches. Because we believe that products have to speak for themselves. The basic question that we ask ourselves is: which innovative technologies and materials can be employed for our craft and provide solutions for rendering our watches even more practical for everyday use? It is often worth indulging in a little lateral thinking to see what is going on in other industrial sectors or fields of science. We repeatedly go to the limits of physical resources to upgrade our watches – intending to make what’s good even better. Most of our best developments are yet to come!

I am delighted that you have decided to buy a SINN timepiece and hope that it will continue to give you pleasure for many years to come.

Yours,

SINN SPEZIALUHREN IN FRANKFURT AM MAIN

It was back in 1961 that pilot and blind-flying instructor Helmut Sinn founded the company. Since then, we have been committed to producing high- specification mechanical watches. In 1994, the graduate engineer Lothar Schmidt took over the company. This marked the beginning of a new era for the SINN brand because the new owner took a decisive step towards more innovation. Under his leadership, new technologies and materials were introduced, thus providing crucial incentives for our company’s evolution and gradual emergence as an insider’s tip for lovers of fine watches. Today, our name stands for technical innovations – much to the delight of both the trade and our customers alike.

Technical innovations

Take, for example, the condensation-free, anti-reflective, German Submarine Steel diving watch – made possible by HYDRO Technology. Other examples include a chronometer chronograph fashioned from a 22-carat gold alloy that is as hard as stainless steel and a chronometer with a magnetic resistance of up to 100 mT (= 80,000 A/m). There are also watches with a clockwork mechanism optimally protected from aging by an inert gas and integrated dehumidifying capsule. The list would not be complete without mentioning the development of mission timers (Einsatzzeitmesser or EZM in German) for firefighters, special police units, and border patrol guards. DIAPAL is one of our most important technological developments, with oiling no longer needed for the most important functions in the watch thanks to the materials we select. This technology was first used in 2001. With the aid of TEGIMENT Technology, we achieve greatly increased scratch resistance through surface hardening.

Ongoing advancement in technology and quality
Our top priority has always been to develop watches that offer superior performance – both in daily and in professional use. This is why our engineers are working continually to identify which innovative methods, materials, and technologies are best suited for optimizing our watches. Each new development has to first undergo rigorous practical tests before being incorporated. And no watch leaves our workshops before it has been subjected to thorough checking and fine adjustment by our master watchmakers.

Innovations in endurance testing
The world’s largest classification society for maritime safety DNV, has been testing our diving watches for pressure and water resistance since 2005. As part of the DNV official certification process, our diving watches have been treated as part of diving equipment since 2006 and tested and certified per European diving equipment standards. This is unparalleled in the watch industry.

Image:
All of the technical details of our watches are documented by tests. This system of assessment has been specially designed for the certification of the pressure resistance of our diving watches by DNV.

Selected pilot watches are tested and certified by independent institutions according to the DIN 8330 Horology – Aviator watches in an extensive and complex type and unit verification process. This ensures that a DIN 8330-compliant pilot watch is not only a suitable all-round replacement for the on-board timekeeping instruments available to pilots, but is also capable of remaining unaffected by the physical stresses of flight, posing no risk potential for the crew or aircraft, and demonstrating compatibility with other on-board instruments. The Temperature Resistance Technology keeps mechanical watches performing at temperatures ranging from − 45 °C to +80 °C. This technology has proven its worth in the EZM 10 TESTAF, for example, used as part of the official approvals procedure for Airbus Helicopters (formerly Eurocopter) EC 145 T2 high-performance helicopters. The 303 KRISTALL is impressive proof of the functional reliability of our watches under the toughest climatic conditions. Equipped with Temperature Resistance Technology, the chronograph passed the acid test at the Yukon Quest, the world’s most demanding dogsled race. The 203 ARKTIS passed its Arctic endurance test on the wrist of extreme diver Mario M. Weidner, withstanding all dives in the cold waters of the Arctic Ocean above 81 degrees latitude. Both watches were worn on top of protective clothing. The real test was in the extreme temperature fluctuations between water and land – a test that the 303 KRISTALL and the 203 ARKTIS passed with flying colors.

Workshop modifications

• From the robust case and the polished crystal to the exquisitely decorated movement, we make sure that every detail in our watches is fit for purpose. In addition to our technology, the heart of any SINN watch is the fascinating mechanical movement. That is why we rely only on selected renowned manufacturers.
• “SZ movements” is the name given to our movement modifications. The results are high-quality calibers characterized by impressive features. An example of this is the SZ04 with a regulator for the 6100 REGULATEUR series.
• The model series 140 and model 717 use our proprietary chronograph development, the SZ01. It was modeled on the Lemania 5100 caliber used in the EZM 1. One of the biggest differences between the SZ01 and the Lemania 5100 is the former’s stopwatch minute display. This feature now makes it even easier and quicker to record stop times more accurately. This modification aimed to significantly improve the readability of the chronograph function.
• The SZ calibers 02, 03, 05, and 06 are a modification of the SZ01 movement, characterized by an off-center 60-minute counter. The 60-minute scale of the stopwatch minute counter is much simpler and more intuitive to read than the 30-minute scale commonly found in other watches.

SERIES 903

The 903 series is presented in a version that has been technically completely redesigned. Visually recognizable and available as a standard model in two dial variants, it has been elevated to an unparalleled technical level. The functionally designed dial imprints the navigation chronographs in our product range with decades of tradition. For example, the slide rule bezel with a logarithmic scale can be used to calculate times, distances or fuel consumption.

Of particular note is the use of hybrid ceramic luminous elements in the indices, which are meticulously attached by hand, the number 12, and the hour and minute hands. By integrating the illuminating pigments into the respective hybrid ceramic moulded part, a high concentration of illuminant is achieved, resulting in extreme light intensity and perfect readability in the dark.

However, the redesign of the case in particular once again demonstrates our company’s high level of innovation. This case features a silver-electroplated bezel that can be smoothly operated from the outer diameter of the watch. The impressive waterproofness of 20 bar testifies to a feat of engineering that has long shaped the SINN brand. The Tri-Compax arrangement of the silver- electroplated counters completes the classic navigation chronograph’s design. The crowning glory of this model is its column wheel chronograph movement, which has a power reserve of at least 60 hours when fully wound. Watch connoisseurs will immediately recognize that the SINN logo as an appliqué is another fine detail of a consistently sophisticated watch.

TECHNICAL DETAILS

Mechanical Movement

• LJP L110
• Column wheel chronograph, exquisitely decorated
• Self-winding mechanism
• 26 bearing jewels
• 28,800 semi-oscillations per hour
• Seconds stop function
• Anti-magnetic as per DIN 8309

Watch Case

• Case made of stainless steel, polished/sanitized
• Sapphire crystal glass in front, anti-reflective on both sides
• Transparent case back made of sapphire crystal glass, anti-reflective on the interior
• Case back screw-fastened
• Winding crown screwable
• Meet the technical requirements for water resistance, as set out in standard DIN 8310
• Water-resistant and pressure-resistant to 20 bar
• Low pressure resistant
• Band lug width 22 mm
• Case diameter 41 mm

Dial and Hands

• Counters electroplated in silver
• Hybrid ceramic luminous elements, meticulously attached by hand
• 903 St II: Electroplated black dial with sunburst decoration
• 903 St B E II: Dark blue dial and luminous ivory coating

Functions

• Hours, minutes, subsidiary seconds
• Date display
• Chronograph
• Bezel with a logarithmic scale and slide rule function

INSTRUCTIONS FOR USE

Winding the watch (crown position 1)
The crown is screwed down (crown position 0). To loosen the crown, turn it counter-clockwise (crown position 1). The movement is wound manually by turning the crown clockwise. Under normal circumstances, a few turns of the crown are enough to start the movement. We recommend 20 full turns of the crown for the initial use. Simply wearing the watch every day should suffice to keep the self-winding mechanism wound. The power reserve allows you to take off your watch overnight without having to rewind it. About 40 turns of the crown by hand will wind up the watch completely. Because the winding mechanism of your watch is designed for automatic winding with minimal winding speed, the watch should be wound at a moderate, consistent speed when winding by hand to avoid damaging the movement.

Time adjustment (crown position 3)
In crown position 3, the motion is paused. This helps you to set the watch precisely. To set the time accurately, we recommend moving the hand past the desired minute marker and then adjusting it counter-clockwise. Please make sure that the date changes at midnight and not at midday when adjusting the time. Move the hand forward until the date changes before you attempt to set the time. The movement restarts as soon as the crown is no longer in position 3.

Quickset date adjustment (crown position 2)
Do not use this function between 9 p.m. and 3 a.m. Set the crown in position 2 and turn it clockwise until the correct date appears in the date display window. Please do not use the date-setting function between 9 p.m. and 3 a.m. Between these times, the gear wheels used for changing the date are engaged, and the movement could be damaged.

Please take care to fasten the crown after making adjustments.

Using the chronograph to measure time
Your watch comes with a chronograph function (stop function). This enables you to measure and record periods of up to 11 hours, 59 minutes, and 59 seconds. The central stopwatch’s second hand and the small hour and minute hands are used for measuring time with the chronograph function. The chronograph is operated through buttons A and B. The measurement starts when button A is pressed once. Pressing this button again stops the measurement. The measurement is resumed by pressing button A once more. This allows you to add up and record the cumulative time. Button B resets the hands of the chronograph to zero. Please see the diagram for an example of stopped time readings: 1 hour, 37 minutes, 36 seconds.

SLIDE RULE FUNCTION ROTATING BEZEL

The calculation scale on the rotating bezel is based on the principle of a slide rule. It serves to determine times, distances, fuel consumption and other sizes, based on known values.

First and third scale
The movable rotating bezel forms scale 1. With this scale, figure 10 can signify the value 1, 10 100, etc., depending on the order of magnitude. Further scales are located towards the center of the dial. The innermost scale (scale 3) is the minute scale, which you do not need for calculations. The middle scale is used to change minutes into hours when calculations have a result of more than 60 minutes (e.g. 90 minutes – 1:30 hours).

Second scale
The counterpart to the movable rotating bezel is the fixed scale 2. This is the scale meant by the second scale in the following examples. At 60 minutes, the second scale has an arrow labeled MPH. This arrow forms the reference mark for all speed calculations. In addition, the second scale features red markings at the values 10, 33, 36, and 38. For further information about this, please see the following pages, as well as for more information about the red markings at the values 10, 36, and 60 on the scale on the rotating bezel.

Metric scales and logarithmic scales
Scale 1 and scale 2 correspond to scales C and D on the slide rule. That means: you carry out multiplication, division, and rule of three calculations using the disc calculator based on the same principle as with a sliderule. Whether using the disc calculator or a slide rule, to carry out calculations you need at least two scales. Here’s an example: when you oppose two rules (metric scales, see illustration page 30) on a slide rule, you can easily add or subtract two figures (distances). If you use two logarithmic scales instead of these metric ones, the addition becomes a multiplication and a subtraction a division.

Important
Like a slide rule, the disc calculator reflects the numerical sequence of a result. The established rough calculation (estimation of the order of magnitude of the result) is therefore also required without fail here before every operation. The reason: the number 10 can, for example, mean 1, 10, 100, or even 1,000.

MULTIPLICATION
To multiply, look for the first multiplier on the movable scale and move it opposite the reference mark on the fixed scale (see example right, red 10 just above 3 o’clock). Then, look for the second multiplier on the fixed scale. The result can be found on the movable scale opposite the second factor.

Example

• 5 x 13
  Adjust position 13 on the movable scale to opposite the reference mark (red

10. on the fixed scale

• Result
  65, which can be read off on the movable scale opposite position 5 on the fixed scale.

DIVISION
In order divide, look for the dividend on the movable scale and adjust it opposite the divisor on the fixed scale. The result is to be found in the movable scale opposite the reference mark of the fixed scale (red 10).

Example

• 180:3
  Adjust position 18 on the movable scale to opposite position 3 on the fixed scale.

• Result
  60, which can be read off on the movable scale opposite the reference mark on the fixed scale

• Alternative
  Adjust the divisor on the movable scale to opposite the dividend on the fixed scale

• Result
  60, which can be read off on the fixed scale opposite the reference mark (red

10. on the movable scale

RULE OF THREE
With equality of proportion a: b = c : d (rule of three exercises), three values will generally be known, the fourth is the one wanted.

Example 1
50 liters of fuel are to 500 km of the route as x liters (amount wanted) are to 100 km (50 l: 500 km = x l: 100 km)

• 50 x 100: 500
  Adjust position 50 on the movable scale to opposite position 50 on the fixed scale

• Result
  10, which can be read off on the movable scale opposite the 10 on the fixed scale

• Alternative
  Adjust the divisor on the movable scale to opposite the dividend on the fixed scale

• Result
  10, which can be read off on the fixed scale opposite the 10 on the movable scale

RULE OF THREE

Example 2
50 litres of fuel are to 500 km of route as x liters (amount wanted) are to 20 km (50 l: 500 km = x l: 20 km)

• 50 x 20: 500
  Adjust position 50 on the movable scale to opposite position 50 on the fixed scale

• Result
  2, which can be read off on the movable scale opposite the 20 on the fixed scale

• Alternative
  Adjust the divisor on the movable scale to opposite the dividend on the fixed scale

• Result
  2, which can be read off on the fixed scale opposite the 20 on the movable scale

SPEED (PER HOUR), DISTANCE AND TIME
Two of the values for amount, distance, and speed are known, and the third is wanted.

Example 1
For a distance of 105 km (MI), a time of 36 minutes is needed. How fast is the speed?

• Known
  Time (36 minutes) and distance (105 km or MI)

• Wanted
  Speed

• Solution
  Adjust position 105 on the movable scale to opposite position 36 on the fixed scale

• Result
  175 km/h (MPH), which can be read off on the movable scale opposite the MPH arrow on the fixed scale

SPEED (PER HOUR), DISTANCE AND TIME

Example 2
A distance of 570 km (MI) is covered at a speed of 173 km/h (MPH). What time is needed?

• Known Distance (570 km or MI) and speed (173 km/h or MPH)
• Wanted Time
• Solution Adjust position 173 on the movable scale to opposite the MPH arrow on the fixed scale
• Result 198 minutes, which can be read off on the fixed scale opposite position 57 on the movable scale (or 3 hours, 18 minutes on the third scale)

SPEED (PER HOUR), JOURNEY AND TIME

Example 3
A speed of 153 km/h (MPH) is maintained over a time of 35 minutes. What distance is covered?

• Known Time (35 minutes) and speed (153 km/h or MPH)
• Wanted Distance
• Adjust position 153 on the movable scale to opposite the MPH arrow on the fixed scale
• Result 89 km (MI), which can be read off on the movable scale opposite position 35 on the fixed scale

With constant speed, you can also establish the distances for other times without having to change the setting. Simply read off the distance opposite the other time at the relevant position.

SPEED (PER MINUTE)
If you know the speed in km/h or MPH, you can easily also calculate the speed per minute. To do this, set the position on the movable scale that corresponds to the speed in km/h or MPH to the MPH arrow on the fixed scale. Then, read off the speed per minute opposite the reference mark on the fixed scale (red 10) on the movable scale.

Example
The speed is 173 km/h (MPH). How fast is the speed in km (MI) per minute?

• Solution Adjust position 173 on the movable scale to opposite the MPH arrow
• Result in 2.89 km/min (MI per minute), which can be read off on the movable scale to opposite the reference mark on the fixed scale (red 10)

SPEED (PER SECOND)
If the time for a journey is measured in seconds, use the seconds mark (red arrow at 36, corresponding to 3,600 seconds per hour) on the fixed scale.

Example
An aircraft is arriving with a speed of 150 km/h (MPH). The distance between a certain point and the runway threshold amounts to 2 km (MI). How much time is needed?

• Known Speed (150 km/h or MPH) and distance (2 km or MI)
• Wanted Time in seconds
• Solution Adjust position 15 on the movable scale to opposite the second’s mark on the fixed scale (red arrow at 36)
• Result in 48 seconds, which can be read off on the fixed scale opposite position 2 on the movable scale
• Alternative Adjust the second mark on the movable scale (red arrow at 36) to opposite position 15 on the fixed scale
• Result in 48 seconds, which can be read off on the movable scale opposite position 20 on the fixed scale

FUEL CONSUMPTION
Two of the following values are known to you: time, the amount in liters (gal), and consumption in liters per hour (gal/h).

Example 1
The flight time is 2 ¾ hours and the average consumption is 20 l/h (gal/h).

How much is the total consumption?

• Known Time (2 ¾ h) and consumption (20 l/h or gal/h)
• Wanted Amount
• Solution Adjust position 20 on the movable scale to opposite the MPH arrow on the fixed scale
• Result 55 l (gal), which can be read off on the movable scale opposite position 2:45 (hours) on the third scale or position 165 (minutes) on the fixed scale

FUEL CONSUMPTION

Example 2
The remaining reserve amounts to 80 l (gal), and the average consumption to 15 l/h.

How long is the remaining flight time?

• Known Amount (80 l or gal) and consumption (15 l/h or gal/h)
• Wanted Time
• Solution Adjust position 15 on the movable scale to opposite the MPH arrow on the fixed scale
• Result 5:20 hours, which can be read off on the third scale or 320 minutes on the fixed scale opposite position 8 of the movable scale

FUEL CONSUMPTION

Example 3
The flight duration amounts to 150 minutes (2 ½ hours), total consumption to 30 l (gal).

How high is the average consumption?

• Known Time (150 minutes or 2 ½ hours) and amount (30 l or gal)
• Wanted Consumption
• Solution Adjust position 30 on the movable scale to opposite position 15 on the fixed scale
• Result 12 l/h (gal/h), which can be read off opposite the MPH arrow of the fixed scale

CLIMBING AND DESCENDING
Two of the three values of height, time, and average speed are known.

Example 1
The airplane climbs at 200 m/min (ft/min). At what height is the airplane after 48 minutes?

• Known Speed (200 m/min or ft/min) and time (48 minutes)
• Wanted Height
• Solution Adjust position 20 on the movable scale to opposite the scale reference (red 10) on the fixed scale
• Result 9,600 m (ft), which can be read off on the movable scale opposite position 48 on the fixed scale

CLIMBING AND DESCENDING

Example 2
In 14 minutes, the airplane climbs 6,600 m (ft). How fast is the climbing speed?

• Known Time (14 minutes) and height (6,600 m or ft)
• Wanted Speed
• Solution Adjust position 66 on the movable scale to opposite position 14 on the fixed scale
• Result in 470m/min (ft/min), which can be read off against the reference mark (red 10) on the fixed scale

CLIMBING AND DESCENDING

Example 3
The airplane climbs by 7,800 m (ft) with a rate of climb of 250 m/min (ft/min). How much time is needed?

• Known Height (7,800 m or ft) and change in height (250 m/min or ft/min)
• Wanted Time
• Solution Adjust position 25 on the movable scale to opposite the reference mark on the fixed scale (red 10)
• Result 31.2 min, which can be read off on the fixed scale opposite position 78 on the movable scale

LANDING AND TAKE-OFF
Two of the three values of speed, distance, and time are known. Calculation of the unknown value is performed as in the examples on pages 44–49.

Example
For the example on page 64, a speed of 110 km/h (MPH) applies and a wind speed (tailwind) of 25 km/h (MPH). How far will be covered once the climb has been completed?

• Known Speed (110 + 25 = 135 km/h or MPH) and time (31.2 min)
• Wanted Distance
• Solution Adjust position 135 on the movable scale to opposite the MPH arrow on the fixed scale
• Result 70 km (MI), which can be read off on the movable scale opposite position 312 on the fixed scale

CONVERTING NAUTICAL MILES (NM), ENGLISH (STATUTE) MILES (MI) AND KILOMETRES (KM)
On the fixed scale there are red marks at 33, 38, and 61 labelled NAUT, STAT, and KM. These are used to convert between the units of nautical miles (NM), English (statute) miles (MI), and kilometres (km).

Example 1
How many nautical miles correspond to a distance of 70 English miles (MI)?

• Known Distance (70 MI)
• Wanted Distance in NM
• Solution Adjust position 70 on the movable scale to opposite the red STAT mark on the fixed scale
• Result in 60.8 NM, which can be read off on the movable scale to opposite the red NAUT on the fixed scale

CONVERTING NAUTICAL MILES (NM), ENGLISH (STATUTE) MILES (MI) AND KILOMETRES (KM)

Example 2
What value in km corresponds to a distance of 50 English (statute) miles (MI)?

• Known Distance (50 MI)
• Wanted Distance in km
• Solution Adjust position 50 on the movable scale to opposite the red STAT mark on the fixed scale
• Result in 80 km, which can be read off on the movable scale opposite the red KM mark on the fixed scale

ADJUSTING THE LENGTH OF THE SOLID BRACELET

• If you don’t know how to shorten or lengthen the solid bracelet, please contact your SINN dealer or the watchmakers in our customer service department in Frankfurt am Main. Our customer service employees are also happy to help you over the telephone.
• Determine the relative lengths of the two sides before adjusting the length of the bracelet. To ensure maximum comfort, both sides of the bracelet should contain the same number of links. If this is not possible, the top bracelet strap (above the 12 on the clock) should be longer.

It is not necessary to detach the solid bracelet from the watch or the clasp.

1. Loosen the screws on the side of the bracelet link which is to be removed or added.
2. Remove the superfluous bracelet link or insert a new one.
3. Before screwing tight, add a small drop (no more!) of the thread-locker (AN 302-42 medium-tight) to the thread of the bracelet screw.

Warning

Safety note!
Thread-locker (AN 302-42 medium-tight) contains:

• 2-hydroxyethyl methacrylate, cumene hydroperoxide.
• May cause an allergic skin reaction. May cause respiratory irritation.
• Wear protective gloves. UFI: 51T6-80C3-800Q-SCR2

ADVICE

Water resistance
In its original condition, your watch fulfills the technical requirements of water resistance according to DIN 8310. The static compressive stress of your watch is given in the bar. Every one of our watches is tested for water resistance. However, in everyday use, it is important to note that seals can suffer from wear and aging over time due to a wide range of factors that arise when wearing a wristwatch. We therefore recommend having the water resistance checked at least once a year. To ensure your watch retains its water resistance for as long as possible, rinse it with tap water if it comes into contact with seawater, chemicals, or the like. Continual mechanical stress in the form of shocks and vibrations can also not only reduce water resistance but also increase the wear and tear of the movement. Care should therefore be taken to protect your watch from unnecessary impacts.

Accuracy
The measured results of the watch’s rate are always “snapshots” taken under laboratory conditions. For this reason, we also take each owner’s movements into account when making a specific regulator correction. It is therefore only possible to judge the accuracy of your watch after it has been in operation for approximately eight weeks. In the event of a deviation, please keep a daily record of its timekeeping over an extended period, for example, one week.

Do you have any questions? Our employees will be pleased to advise you.

• Telephone: + 49 (0)69/97 84 14 – 400
  Telefax: + 49 (0)69 / 97 84 14 – 401
  E-mail: service@sinn.de.

SERVICE

Does your Sinn watch need an inspection, repair, retrofitting, or reconditioning?

• If possible, please use our service order form. For information about our service order form, please refer to the section entitled “Customer Service” on our website at www.sinn.de/en and to the section entitled “Servicing and repairs” in our general terms and conditions at www.sinn.de/en. We would be happy to send you a copy of the general terms and conditions.
• Our international partners generally offer on-site service. However, should they be unable to provide a certain service, they will organize the safe dispatch and return of the Sinn watch to our manufactory in Germany. Please be aware that our partners will wait until they have a sufficient number of Sinn watches before they post a shipment, to keep transport costs and customs duties to a minimum.
• This will increase the processing time.
• Alternatively, you can send your Sinn watch to us directly. You will be required to cover the postage costs for the delivery and return shipment, which vary depending on the country. For insurance reasons, we strongly recommend sending us any returned goods by registered parcel post. We regret that we are unable to accept deliveries with unpaid postage!
• In case you have a chance to drop off your watch directly at our office in Frankfurt am Main we look forward to your visit. Please make a note of our opening times.

For information about our service, please refer to the section entitled “Customer Service” on our website www.sinn.de/en, or +49 (0)69/97 84 14 – 400.

© Sinn Spezialuhren GmbH

1st Edition/May 2024
Subject to changes in technical specifications.

References

• Sinn-Spezialuhren
• Sinn-Spezialuhren

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