IWC · Da Vinci

Strap for Da Vinci Perpetual Yellow Gold / Diamond / White / French / Bracelet

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 diameter39 mm
ReferenceIW9253-04 (aka: IW925304)
FamilyDa Vinci
MovementIWC caliber 79261 Hours, Minutes, Small Seconds | Date, Day, Month, Perpetual Calendar, Year Indicator | Chronograph
CaseYellow Gold

Spring bar

Swiss Standard universal spring bars

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

The Da Vinci IW9253-04 (aka: IW925304), seen from the bench

The IWC Da Vinci IW9253-04 is a perpetual chronograph in yellow gold with a 39mm case, representing the watchmaking tradition of Schaffhausen. It features the IWC 79261 calibre, a chronograph movement with integrated perpetual calendar displaying hours, minutes, small seconds, date, day, month, year indicator and chronographic function. The 19mm lug width is characteristic of this family and ensures precise compatibility with high-end straps without adapters. The sapphire caseback reveals the manually decorated plates and internal rose gold components.

Frequently asked questions

What is the lug width of the IWC Da Vinci IW9253-04?

The IWC Da Vinci IW9253-04 features a lug width of exactly 19mm. This measurement is specific to the Da Vinci family and represents the constructive balance between the case diameter (39mm) and the classical elegance of its design. When ordering an aftermarket strap, always ensure it is calibrated for 19mm lugs to avoid visual gaps between case and leather.

Which type of strap is most suitable for the Da Vinci IW9253-04?

For formal and daily wear, Italian alligator leather with vegetable tanning remains the historical choice: its natural texture and the patina it develops over time reflect the dignity of the yellow gold case. Shell cordovan offers an alternative for those desiring greater tactile density and a mirror-like patina. Premium calf leather is recommended for intensive daily use. NATO straps are not advised for this yellow gold case, as they conflict with the watch's classical vocation.

How do I change the strap on the IWC Da Vinci IW9253-04?

Strap replacement requires a spring bar tool (forked implement) to gently compress the pins connecting the strap to the 19mm lugs. Position the watch on a soft surface, insert the spring bar tool beneath the lug, compress the pin and remove the old strap. Repeat on the other side. To fit the new strap, align its holes with the pins and push gently until the locking click. If you prefer to avoid the risk of scratching the yellow gold case, the Casati Milano atelier offers a professional change service on-site.

Can I use an aftermarket compatible strap on this model?

Yes, any strap with a 19mm lug width is compatible with the IWC Da Vinci IW9253-04. Artisanal online straps are available in alligator, shell cordovan, calf and other premium leathers, with customization options for length, initials and stitching thread colour. The essential point is to always verify the 19mm specification at order time and choose thickness and structure that respect the classical elegance of the yellow gold case.

How long does a leather strap last on a watch like the Da Vinci?

Durability depends on the leather type and usage. Vegetable-tanned alligator in good condition lasts 3–5 years of moderate daily wear, then requires replacement for aesthetic rather than functional reasons (patina becomes excessive). Shell cordovan is more durable (5–7 years) due to structural density. Premium calf lasts 2–4 years of intensive use. The 18-month warranty on Casati Milano straps covers manufacturing defects and ensures post-purchase assistance. To maximize longevity, rotate between straps (using 2–3 variants) and protect leather from prolonged water exposure and excessive perspiration.

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