IWC · Da Vinci

Strap for Da Vinci Perpetual Rattrapante Yellow Gold / Diamond / Silver / French

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
ReferenceIW8154-04 (aka: IW815404)
FamilyDa Vinci
MovementIWC caliber 79251 Hours, Minutes, Small Seconds | Date, Day, Month, Perpetual Calendar, Year Indicator | Chronograph, Rattrapante
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 IW8154-04 (aka: IW815404), seen from the bench

The IWC Da Vinci ref. IW815404 is equipped with the 79251 caliber featuring a split-seconds chronograph function and a full perpetual calendar with date, day, month, and year indicators. The movement offers hours, minutes, small seconds, and advanced chronograph complications. 19mm lugs for the strap.

Frequently asked questions

What is the lug width of the IWC Da Vinci IW8154-04?

The lug width of the IWC Da Vinci IW8154-04 is 19mm. This is a standard dimension for mid-sized watches (38-41mm) and allows you to fit any strap designed for this measurement, available in numerous leather types, colours, and finishes.

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

For the IWC Da Vinci IW8154-04 in yellow gold, we recommend alligator straps in medium brown (natural patina warming to the gold) or vegetable-tanned leather for visible ageing. Black alligator provides formal contrast, whilst grained calf offers everyday versatility. Choice depends on intended use: formal (brown alligator), sporty (grained calf), contemporary (navy NATO).

How do you change the strap on an IWC Da Vinci IW8154-04?

To change the strap, use a spring bar removal tool to compress and extract the metal pins connecting the old strap to the watch lugs. Align the holes of the new 19mm strap with the lugs, insert the pins one at a time, and verify full engagement. If inexperienced, consult a qualified watchmaker or specialist atelier to avoid damaging the pins.

Is an aftermarket strap compatible with the IWC Da Vinci IW8154-04?

Yes, any strap with a 19mm lug width is compatible with the IWC8154-04. We recommend specialised manufacturers guaranteeing construction quality (premium leather, double stitching, precise finishing). Aftermarket straps offer maximum customisation in colour and material, from alligator to shell cordovan, vegetable tanning to vulcanised rubber.

How long does a natural leather strap last on a daily-wear watch?

A quality natural leather strap (alligator, shell cordovan, vegetable-tanned calf) typically lasts 2-4 years with daily wear, varying according to humidity exposure, perspiration, and UV exposure. Vegetable-tanned leather ages visibly but remains functional beyond 4 years. To extend lifespan, we recommend rotating with other straps, quarterly cleaning with a damp cloth, and storage in a dry environment. Casati Milano atelier provides 18-month warranty on all handcrafted straps.

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