IWC · Da Vinci

Strap for Da Vinci Perpetual Rattrapante Platinum / Diamond / Silver / English / 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
ReferenceIW9257-03 (aka: IW925703)
FamilyDa Vinci
MovementIWC caliber 79251 hours, minutes, small seconds | date, day, month, perpetual calendar, year indicator | Chronograph, Rattrapante
Year1995 - 2001
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 IW9257-03 (aka: IW925703)

Selected for the 19 mm lug width

All 19 mm straps →

The Da Vinci IW9257-03 (aka: IW925703), seen from the bench

The IWC Da Vinci IW925703 features the IWC 79251 caliber with perpetual calendar, split-seconds chronograph and year indication functions. The watch has hours, minutes, small seconds, date, day, month plus chronograph complications. 19mm lugs complete the technical specifications of the model.

Frequently asked questions

What is the lug width of the IWC Da Vinci IW9257-03?

The lug width of the Da Vinci IW9257-03 is 19mm. This dimension is specific to this model and ensures correct proportions between the 39mm case and strap. Any aftermarket strap must be precisely 19mm in width to fit perfectly on the lugs.

What is the best strap for the IWC Da Vinci IW9257-03 in yellow gold?

For the yellow gold version of this reference, we recommend alligator leather in cognac or dark brown tones, which develops a rich patina and creates chromatic harmony with the warm metal. Alternatively, vegetable-tanned calf offers subtler grain and ages with dignity. For sporty occasions, FKM rubber in black amplifies the technical character of the visible movement.

How do you change the strap on an IWC Da Vinci watch?

The Da Vinci uses straight 19mm lugs. To change the strap: gently lift the springbar on both sides using a dedicated tool, remove the spring, take off the old strap, insert the new one, and verify the springbar is securely fastened. If the strap features a deployante clasp, ensure it is correctly oriented towards your wrist.

Are aftermarket 19mm straps compatible with the IWC Da Vinci IW9257-03?

Yes, all straps with 19mm lug width are technically compatible. However, quality varies significantly. Artisanal 19mm straps from Milano Straps guarantee hand-finished construction, premium leathers, and finishes coherent with the watch's inherent quality. Casati Milano also offers bespoke personalisation (initials, specific stitching thread, adjustments).

What is the average lifespan of a leather strap for the IWC Da Vinci?

A quality leather strap, such as shell cordovan or vegetable-tanned calf, lasts approximately 3–5 years with daily wear. Longevity depends on sun exposure, moisture and maintenance practices. Milano Straps guarantees 18 months on the finished product and recommends replacement when the leather shows significant creasing at the keeper. Proper drying after water contact significantly extends durability.

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