IWC · Da Vinci

Strap for Da Vinci SL Chronograph MecaQuartz Yellow Gold / White

Takes 19 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

19mm
Lug width19 mm
Case diameter37 mm
ReferenceIW3728-03
FamilyDa Vinci
MovementJaeger-LeCoultre caliber 631 hours, minutes, small seconds | date | Chronograph
Year1998 - 2002
CaseYellow Gold

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Da Vinci IW3728-03

Selected for the 19 mm lug width

All 19 mm straps →

The Da Vinci IW3728-03, seen from the bench

The IWC Da Vinci reference IW3728-03 houses the Jaeger-LeCoultre 631 caliber with functions of hours, minutes, small seconds, date and chronograph. The watch features 19mm lugs and represents IWC's interpretation of the timepiece with chronograph complications. The mechanical movement offers the essential functionalities for the measurement of intermediate times.

Frequently asked questions

What is the lug width of the IWC Da Vinci IW3728-03?

The IW3728-03 is equipped with 19-millimetre lugs, a critical dimensional specification that makes this model particularly distinctive in the search for aftermarket straps. The measurement must be verified with precision using a digital calliper perpendicular to the lugs, excluding any bevels or surface chamfers.

Which type of strap is recommended for the Da Vinci IW3728-03?

For the IW3728-03 in yellow gold, structured alligator represents the most coherent choice from an aesthetic and historical perspective. Vegetable-tanned calf leather offers patina that matures beautifully, whilst shell cordovan guarantees natural lustre and formal authority. Vulcanised rubber and NATO straps remain alternative options to emphasise the chronograph's sporting character.

How do I change the strap on a watch with 19mm lugs?

Strap changing requires the use of a spring bar remover, a dedicated tool that allows extraction of the pin (spring bar) from the lugs. Position the tool horizontally beneath the pin, apply gentle downward pressure, and simultaneously withdraw the strap. Reverse the procedure to install the new strap, ensuring the lugs are perfectly aligned and the pin is fully inserted.

Can I use an aftermarket strap compatible with the Da Vinci IW3728-03?

Absolutely. It is essential that the strap is specified for the 19-millimetre lug width. High-quality artisanal straps, such as those available on milanostraps.it, guarantee precise compatibility and permit customisations in leather, colour, keeper length, and buckle type, including deployante if desired.

How long does a leather strap last on the IW3728-03?

A quality leather strap, crafted from noble leathers such as alligator, calf or shell cordovan, has an estimated lifespan of 3 to 5 years with regular use. Longevity depends on frequency of wear, exposure to UV radiation, humidity, and periodic maintenance. A vegetable-tanned strap of high selection often develops a fascinating patina over time, and frequently ages better than one might initially predict.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only