DuFrane Watches Bergstrom MkIV Watch Owner’s Manual

: July 2, 2024
: DuFrane Watches

Table of Contents

Bergstrom MkIV Watch
Operation:
Time Setting:
Adjusting the Bracelet:
Basic Care
WARRANTY
MAINTENANCE
CONTACT
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

The Bergstrom MkIV
Owner’s Manual

Bergstrom MkIV Watch

Thank you and welcome!
Thank you for purchasing your new DuFrane Watches Bergstrom MkIV! From Austin, Texas, I am committed to designing and engineering stylish pieces that will provide years of trouble-free timekeeping. This guide provides operational instructions, as well as some best practices, for caring for your new timepiece.
Steven
Founder

Operation:

POSITION 1- unscrew the crown counter clockwise, the crown will gently pop out for manual winding.
POSITION 2- gently pull out the crown one click, this will allow date setting.
POSITION 3- gently pull out the crown second click to set time. This stops the seconds hand, also called hacking.

Time Setting:

The Bergstrom MkIV uses a Swiss Sellita SW261-M mechanical hand wound movement. This movement, when fully wound, will run for approximately 45 hours. A full wind is approximately 20-25 full turns of the crown. If your watch has sat unworn for a few days and has stopped, simply unscrew the crown (it will slightly ‘pop out’) to position 1, and gently turn the crown clockwise about 20 turns. This will start the watch and you can then set the time and date. It is recommended to set the time first before adjusting the date, noting if it is set to AM or PM. Meaning, when the time passes 12:00 position, the date either changes or does not.
NOTE: Date correction should not be done when the time is between 8pm to 2am as the watch gearing will already be aligning itself to change the date at 12am.
Always make sure to screw the crown back flush with the case after winding or adjusting the time. This ensures the case maintains its’ water integrity.

Adjusting the Bracelet:

Your Bergstrom MkIV includes a Mesh bracelet with a sliding buckle anchor to adjust the bracelet size. Simply flip up the buckle clasp (the one without the DuFrane mark) and freely move the bracelet to the desired position, and close the clasp to lock it in place.

To remove the bracelet, locate the two 2mm Allen tools packaged with your Bergstrom, inserting one on each end of the screw bar. Gently unscrew the head of the screw bar and pull out the bar (keeping track to not lose the tiny screw head!). Place your new straps between the lugs and insert the screw bar, and carefully (using the Allen tools) tighten the screw head back into position. No need to torque the screw super tight, just snug.

Basic Care

Your Bergstrom MkIV is made with durable, marine grade 316L stainless steel. It should withstand normal daily bumps and knocks quite effectively. Additionally, the sapphire crystals (both front and back) are extremely hard and very scratch resistant, second only to diamonds. Any soft cloth works very well to clean the crystal and case to remove light dirt and smudge marks.
Water- The Bergstrom MkIV is rated for 165 feet of water pressure, or 50 meters (5ATM). If you do take your Bergstrom into saltwater, it’s a good idea to simply run fresh water over it to clean off any salt residue. It is also recommended to remove your watch before hot water activities (such as hot tub or shower). The differences in expansion rates for silicone/rubber (the gaskets that seal the watch) and the metal case itself vary, so there is a slight possibility of introducing water inside the case in extreme examples. It is very unlikely, but it is still a best practice to remove your watch before entering hot water.

WARRANTY

Your Bergstrom MkIV comes with an international two-year warranty, starting from the Date of Shipment as noted on your Warranty Card. Since I build each piece and ship it directly to you, the Date of Shipping will be noted on each Warranty Card (so keep it!).
What does this mean? If your DuFrane Watch fails due to a manufacturing defect resulting in normal use, I will replace free of charge any defective component appropriately recorded during a technical evaluation during the warranty period. Simply fill out the information on the Warranty page on www.dufranewatches.com to start the process.
What isn’t covered? Accidental damage, scratches, theft and normal wear and tear are not warrantable items.
Additionally, this warranty does not cover any damage to the watch case, crystal, watch bracelet / band, bezel, straps, screws, crown/stem, finishes, clasps/buckles, or any other physical damage to the watch, as well as lost screw bars. Don’t improperly use or mistreat your watch, and it can last for many decades.

MAINTENANCE

Since only genuine Swiss movements are used, any reputable watch repair facility can tune and perform regular maintenance. It is recommended that every 5-7 years, bring your watch into a watch repair facility for service, unless you notice performance issues such as running fast or slow by more than +/- 3 minutes a day prior to the ~5 year interval, then bring it in for service sooner. These are mechanical marvels. However, they rely on jewels and oils to keep friction to a minimum. And just like anything mechanical (a car, motorcycle, guitar…), maintenance needs to be performed.