Audemars Piguet · Royal Oak Offshore

Strap for Royal Oak Offshore Diver Stainless Steel / Purple

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

Integrated bracelet

The Audemars Piguet Royal Oak Offshore 15710ST.OO.A077CA.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 diameter42 mm
Reference15710ST.OO.A077CA.01
FamilyRoyal Oak Offshore
MovementAudemars Piguet caliber AP 3120 hours, minutes, seconds | date
Year2018
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

The Royal Oak Offshore 15710ST.OO.A077CA.01, seen from the bench

The Royal Oak Offshore represents the sporty evolution of the Audemars Piguet Royal Oak line, launched in the 1990s. It mounts the automatic AP 3120 calibre with indication of hours, minutes, seconds and date. The reference 15710ST.OO.A077CA.01 features a stainless steel case with the characteristic octagonal screwed bezel.

Frequently asked questions

Can a strap be fitted to the Audemars Piguet Royal Oak Offshore 15710ST.OO.A077CA.01?

The bracelet is integrated into the case: there is no standard lug to attach an off-the-shelf strap. This is not a limitation — it is a precise design decision by Audemars Piguet. The only solution is to build a strap from scratch, directly on the watch, in the atelier.

How does the bespoke strap process work for this model?

I work on this Royal Oak Offshore exclusively at <a href="/pages/casati-booking">Casati Milano</a>, by appointment only, at Via XX Settembre 15, Milan. I bring the watch to the bench, study the case geometry and model the strap from zero — every curve, every thickness calibrated on the actual case. No generic templates: every piece is one of a kind.

Which leather do I recommend for the Royal Oak Offshore?

For a watch with this character — sporting, built to endure — I choose Tuscan vegetable-tanned leather. It ages with wear, develops a personal patina over time and holds up well on an active wrist. If something more refined and understated is preferred, Barenia is my second choice: it transforms beautifully over the years.

How long does a well-made strap last?

A properly built strap, in quality leather, easily lasts five or six years of regular wear — sometimes more. Care matters: keep it away from excess water and condition the leather occasionally. Vegetable-tanned leathers do not degrade — they transform, and after a few years they look better than when they were new.

What sets the Royal Oak Offshore apart from the classic Royal Oak?

The Offshore was born in 1993 as a larger, more assertive version, designed for those who want a stronger presence on the wrist. The case is more substantial, the Méga Tapisserie dial has a bolder texture compared to the Petite Tapisserie of the classic Royal Oak. The eight visible screws on the hexagonal bezel are the same — but here everything is amplified. This is a watch that does not try to go unnoticed.

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.

Request an appointment →

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