Royal Oak Openworked 15203 Extra-Thin 40th Anniversary Platinum

In Context

At 39 mm it sits just under the modern norm — the band that suits the widest spread of wrists. At 8.1 mm thick it is about average for a modern wristwatch. The case back is open, so the movement is visible without taking the watch apart, and the sapphire crystal will resist everything short of deliberate abuse. 50 m covers rain and hand-washing comfortably; it is not a watch to swim in.

The movement winds itself from the motion of your wrist. 40 hours of reserve carries it overnight, but not through a weekend in a drawer. At 21,600 vph the seconds hand advances 6 times a second, the slower and more audible rate of an older design.

15203PT.OO.1240PT.01 stands on its own in this catalogue — no other reference here shares its base number. It pairs a skeleton dial with a platinum case. It was a limited edition.

Slim (3.05mm) self-winding movement, originally created by Jaeger-LeCoultre and used by Audemars Piguet, Vacheron Constantin and Patek Philippe; skeletonized with manual finish on both bridges and mainplate. Sapphire calendar disc.

1 other watch in the library runs the Audemars Piguet AP 5122.

Audemars Piguet

Royal Oak 15204 Openworked Extra-Thin Pink Gold

15204OR.OO.1240OR.01 · 39 mm