LONGINES L688 CHRONOGRAPH Watch Instruction Manual
- June 5, 2024
- LONGINES
Table of Contents
LONGINES L688 CHRONOGRAPH Watch
Product Information
Specifications
- Brand: LONGINES
- Model: [Model Name]
- Water-Resistance: Up to 30 bar (300 m)
- Manufacturer: Compagnie des Montres Longines, Francillon S.A.
- Origin: Saint-Imier, Switzerland
Product Usage Instructions
Setting the Time
- Unscrew or pull out the crown to position 2.
- Rotate the crown to set the correct time.
- Push the crown back in and screw it down to ensure water-resistance.
Using the Chronograph
- To start or stop the chronograph, press the start/stop push-piece (2).
- To reset the chronograph hand and counters, press the reset push-piece (3).
- The 30-minute counter (F) and 12-hour counter (G) can be used to time events up to 12 hours.
Date Correction
Use the date corrector (4) to adjust the date display when needed.
Water-Resistance Maintenance
Rinse the watch in soft water after contact with sea water. Have its water-
resistance checked annually by an approved LONGINES Service Centre. Do not
open the watch yourself.
Frequently Asked Questions (FAQ)
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Q: How often should I have my LONGINES watch serviced?
A: It is recommended to have your watch serviced by an official LONGINES dealer or approved Service Centre every 3-5 years to ensure optimal performance and longevity. -
Q: Can I swim with my LONGINES watch?
A: The water-resistance of your watch allows for swimming and water activities. However, avoid pressing buttons underwater and ensure the crown is securely closed before immersion. -
Q: Where can I find more information about my watch’s features?
A: Visit www.longines.com/instruction-manual or scan the QR code provided in the manual for detailed information and tutorials.
INSTRUCTION MANUAL
INTERNATIONAL WARRANTY
LONGINES is delighted you have chosen a time-piece from its collection, which
lives up to the brand’s long-established know-how, based on re-search combined
with technical excellence and timeless elegance.
La Compagnie des Montres Longines, Francillon S.A. grants you, with effect
from the purchase date, a twenty-four (24) month warranty on all LON- GINES®
watches models and a five (5) year war-ranty on the automatic watches
purchased from January 1, 2021, under the terms set out in this warranty. All
watch straps and bracelets are cove-red by a 24-month international warranty
for any material or manufacturing defects. The LONGINES international warranty
covers defects in materials and manufacturing that exist at the time of
delivery of the LONGINES watch purchased (“defects”). The warranty takes
effect only if the warranty certificate has been dated and fully completed by
an official LONGINES dealer (“valid warranty certificate”). Dur-ing the term
of the warranty and on presenting the valid warranty certificate, you are
entitled to have any defect repaired free of charge. In the event that repairs
cannot restore your LONGINES watch to full working order, La Compagnie des
Montres Longines, Francillon S.A. undertakes to replace it with an identical
LONGINES watch or another LONGINES watch with similar characteristics. The
warranty for the replacement watch expires on the same date as the warranty
for the replaced watch.
The warranty does not cover
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battery life;
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normal wear and tear (such as scratches on the case and/or glass; alteration of the colour and/or material of cases, straps, bracelets and chains made of leather, textile, rubber or any other non-metallic material; the PVD coating; the colour of bronze);
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damage to any part of the watch resulting from unsuitable/improper use, neglect, carelessness, accidents (knocks, dents, crushing, scratches when changing the strap/bracelet, etc.), incorrect use of the watch, or failure to follow the instruction manual;
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harm of any nature whatsoever resulting directly or indirectly from using the LONGINES watch or from any operational failure, defect or lack of precision in the watch;
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a LONGINES watch handled by non-approved person (for example, for the purposes of replacing the battery or carrying out servicing or repairs) or having been altered from its original state other than under the supervision of La Compagnie des Montres Longines, Francillon S.A.
Any other claims against La Compagnie des Montres Longines, Francillon S.A., for example for any kinds of damage or harm other than those set out in this warranty, are expressly excluded, excepting statuto-ry rights that the purchaser can assert against the manufacturer. -
This manufacturer’s warranty:
- is independent of any warranty that may be provided by the vendor and for which the vendor accepts sole responsibility;
- in no way affects the purchaser’s rights against the vendor nor any other statutory right the purchaser may have against the vendor.
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The Customer Service department of La Compagnie des Montres Longines, Francillon S.A. ensures your LONGINES watch is perfectly maintained. If your watch needs servicing, entrust it to an official LONGINES dealer or an approved LONGINES Service Centre as listed on our website at www.longines.com: their servicing is guaranteed to comply with the standards of La Compagnie des Montres Longines, Francillon S.A.
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Compagnie des Montres Longines, Francillon S.A., CH-2610 Saint-Imier, Switzerland.
LONGINES® is a registered trademark
We are delighted you have become the owner of a LONGINES watch. We recommend
you read this instruction manual carefully before using your LONGINES watch
for the first time in order to en-sure its correct operation and long life. If
you would like more information about your watch or if it is fitted with a
complication, you can find detailed in-formation and tutorials by going
to our website at www.longines.com/instruction-
manual or by scanning the QR
code.
Precautions concerning water-resistance
A watch’s water-resistance can be affected by changes caused by the gaskets
drying out, or an accidental shock to the crown. To help maintain your watch’s
water-resistance, we recommend rinsing it in soft water after any contact with
sea water and having its water-resistance checked once a year by an approved
LONGINES Service Centre. In no circumstances should you open your watch
yourself.
IMPORTANT! Never activate the time-setting crown and/or push-pieces when the watch is underwater, and ensure that the crown and push-pieces are pushed in or screwed down before any immersion in water.
- The water-resistance values indicated in metres are equivalent to the overpressure applied under standard ISO 22810.
CHRONOGRAPH – L688
- A Crown
- B Hour hand
- C Minute hand
- D Small seconds
- E Date window
- F 30-minute counter
- G 12-hour counter
- H Chronograph seconds hand
- 2 Start/ stop push-piece. Engage and disengage the chronograph hand and counters
- 3 Chronograph hand and counters reset push-piece
- 4 Date corrector
Hour, minute, seconds and date display. Can be used to time events lasting up to 12 hours, displaying the results to the nearest 1/5th of a second.
Screw-in crown
Some LONGINES models are equipped with a screw-in crown, which must be
unscrewed before setting the time, correcting the date or winding, by turning
it anti-clockwise. After making the settings, return the crown to position 1,
then push it back in and screw it in firmly to ensure the watch’s water
resistance.
Avoid setting the time while the chronograph function is in use
Setting the time and stop seconds
Pull the crown out to position 2 when the small seconds hand (situated at 9
o’clock) is at 60. Turn the crown either way to the desired time display. As
soon as the time is synchronised, push the crown back into position 1.
If you have not been wearing your mechanical watch, it needs to be wound
manually through thirty revolutions or so.
Avoid any date correction, or use of the corrector 4, between 20:00 and 03:00;
this could damage the mechanism.
Quick date correction
- Press the corrector 4 to correct the date using the corrector tool
- The date needs to be corrected after every month shorter than 31 days. The date will change when the hour hand passes midnight.
- Before each timing operation, the chronograph hands must be at their start point.
Standard Start – Stop – Reset function
Timing a single event:
- Press push-piece 2: the chronograph will start.
- Press push-piece 2: the chronograph will stop.
- Press push-piece 3 to reset.
Rally Add function (partial times)
Used for measuring successive events, but not the intervals between them. Each
result is automatically added to the preceding one. To time the various stages
of a car rally, for example, follow the procedure below:
- At the start of the first stage, press push-piece 2: the chronograph will start.
- At the end of the first stage, press push-piece 2 again: the chronograph will stop.
- Repeat for each stage of the rally.
- At the end of the final stage the chronograph will show the total time of the rally, in other words, the accumulated time for all the stages.
- Press push-piece 3 to reset.
Tachymeter scale
Enables the wearer to read the speed in km/h. Time how long it takes to travel 1 kilometre. The point where the seconds hand stops indicates the average speed. If it takes 30 seconds to travel 1 km, the scale will indicate an average speed of 120 km/h.
Pulsometer scale
Enables the wearer to directly read their heart rate, by starting the
chronograph and counting 30 beats
LONGINES WARRANTY CARD
Scanning the QR code on your watch’s warranty card with your smartphone’s camera gives you access to the LONGINES website. There you will find the specific instruction manual for your watch, avail-able in 33 languages, together with advice for maintaining your watch and the warranty terms.
You can also access this information via the QR code to be found in the
instruction manual, or by going to: www.longines.com/instruction-
manual
www.longines.com/instruction-manual