Audemars Piguet · Royal Oak

Strap for Royal Oak Chronograph 41 Pink Gold / Blue / Alligator

Integrated bracelet: measurements, the most common questions, and the way to a made-to-measure strap.

Integrated bracelet

The Audemars Piguet Royal Oak 26331OR.OO.D315CR.01 is designed with a bracelet integrated into the case. For a compatible made-to-measure strap, the Casati Milano atelier builds it on your watch.

Case diameter41 mm
Reference26331OR.OO.D315CR.01
FamilyRoyal Oak
MovementAudemars Piguet caliber AP 2385 hours, minutes, small seconds | date | Chronograph, column wheel
Year2017
CaseRose Gold

Spring bar

Swiss Standard universal spring bars

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

The Royal Oak 26331OR.OO.D315CR.01, seen from the bench

The Audemars Piguet Royal Oak ref. 26331OR.OO.D315CR.01 is a 41mm chronograph in pink gold with a bold octagonal case and integrated bracelet, designed by Gérald Genta in 1972. This model features a special integrated attachment requiring bespoke strap modification by skilled artisans to maintain the original proportions and dialogue with the iconic hexagonal screws.

Frequently asked questions

Can a strap be fitted to the Audemars Piguet Royal Oak 26331OR.OO.D315CR.01?

The Royal Oak's bracelet is integrated into the case: there is no standard lug to attach a traditional strap. The attachment is part of the original design, conceived to work in unison with the pink gold case. To replace the bracelet with a leather strap, the only viable route is to build one bespoke, directly on the watch, in the atelier.

How does the bespoke strap process work for this model?

I work exclusively by appointment at <a href="/pages/casati-booking">Casati Milano</a>, at Via XX Settembre 15 in Milan. I bring the watch to the bench, take measurements directly from the case, and hand-shape the leather attachment until it flows naturally with the octagonal geometry. There are no templates: every strap is made for that specific watch.

Which leather do I recommend for this Royal Oak?

For a pink gold Royal Oak, my choice is naturally aged Barenia. It has a texture that gradually moulds to the wrist and develops a warm patina that complements the pink gold tone without competing with it. It is a leather that tells the story of use — and a Royal Oak deserves exactly that kind of narrative on its strap.

How long does a well-made strap last?

A strap built from top-grade leather and hand-stitched will comfortably last five, even eight years of regular wear. Leather asks for modest care: keep it away from prolonged exposure to water and condition it occasionally with a neutral wax. A well-tended Barenia does not deteriorate — it transforms, and often improves.

What makes the Royal Oak's design so challenging when fitting a strap?

The Royal Oak was designed with a bracelet that flows as an extension of the case: the transition between the two is seamless, with no visual break. When replacing the bracelet with a strap, that continuity must be rebuilt by hand, respecting the case's curvature and the eight hexagonal screws that define its character. I have seen many attempts made without this attention — and it always shows.

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