Technical Archive

Audemars Piguet
Royal Oak 26239OR.OO.D812CR.01 (aka: 26239OR.00.D812CR.01)

Audemars Piguet Royal Oak 26239OR.OO.D812CR.01 (aka: 26239OR.00.D812CR.01): strap made to measure on the watch at the Casati Milano atelier, by appointment.

Royal Oak Chronograph 41 Pink Gold / Brown / Alligator

Technical Specifications

Audemars Piguet 26239OR.OO.D812CR.01 (aka: 26239OR.00.D812CR.01)
Reference

26239OR.OO.D812CR.01 (aka: 26239OR.00.D812CR.01)

Movement

Audemars Piguet caliber AP 4401 Hours, Minutes | Date | Chronograph, Column wheel, Flyback

The Heritage

The Royal Oak Chronograph mounts the AP 4401 automatic caliber with flyback chronograph function and column-wheel. The movement integrates indication of hours, minutes, date and chronograph with column-wheel mechanism. The 26239OR reference features the characteristic octagonal case with fluted bezel typical of the Royal Oak collection.
Made to Measure

The strap for this watch is made to measure

On the Audemars Piguet Royal Oak the bracelet is drawn as part of the case: no catalogue strap will fit. In the atelier we take the measurements on the watch itself and build the strap on the piece — that is the work of Casati Milano.

Book a consultation →

FAQ

Can a strap be fitted to the Audemars Piguet Royal Oak 26239OR.OO.D812CR.01?

On this Royal Oak, the bracelet is integrated directly into the pink gold case. There is no standard lug to attach an off-the-shelf strap. The only viable route is the bespoke one: I build the attachment from scratch, working directly on the watch in the atelier.

How does the bespoke strap service 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. Bring the watch: I take measurements directly from the case, study the geometry of the lugs and shape every component by hand. There are no pre-made templates — each strap is built from scratch on that specific piece.

Which leather would you recommend for the Royal Oak in pink gold?

For this model I go without hesitation for Mississippi Alligator. Pink gold has a warm chromatic temperature, and the Royal Oak carries a sporting-elegant character that alligator reads well: the scale texture engages with the Tapisserie guilloché dial without overpowering it. If something more lived-in and informal is preferred, Vintage Tuscan Leather ages beautifully and develops real character with wear.

How long does a well-made strap last?

With ordinary care — keeping it away from prolonged water exposure and conditioning the leather every few months — a properly crafted strap comfortably reaches ten years and beyond. Alligator tends to hold its structure over time; Tuscan leather patinas, softens and becomes increasingly personal. That is not deterioration — it is the material coming to life.

What makes the Royal Oak such a radical design proposition?

Gérald Genta drew it in a single night in 1972, and you can still feel that tension today. The octagonal case, the bezel with eight exposed hexagonal screws, the integrated bracelet — everything works together to form an object where nothing is decorative in the conventional sense. I have seen many watches over years at the bench: very few have this coherence between form and structure.

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 →

By appointment only · Milan

The atelier's website: casatimilano.com