Royal Oak Extra Thin Selfwinding Flying Tourbillon Chronograph RD#5

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 sapphire crystal will resist everything short of deliberate abuse. Rated to 20 m, it is protected against rain and splashes and nothing beyond that.

The movement winds itself from the motion of your wrist. 72 hours of reserve puts it well past a weekend — several days off the wrist and it is still going. At 21,600 vph the seconds hand advances 6 times a second, the slower and more audible rate of an older design.

26545XT.OO.1240XT.01 stands on its own in this catalogue — no other reference here shares its base number. It pairs a blue guilloche dial with a titanium, bmg case. Introduced in 2025. Beyond the time it carries a chronograph and a tourbillon.

The Audemars Piguet calibre 8100 is an automatic movement introduced in 2025 with the Royal Oak “Jumbo” Extra-Thin Selfwinding Flying Tourbillon Chronograph (RD#5). It combines a flyback chronograph with a flying tourbillon in an ultra-thin construction, measuring only 8.1mm when cased. The movement features a vertical clutch and column wheel for precise and smooth chronograph operation, along with a patented reset mechanism. Its symmetrical layout places chronograph counters at 3 and 9 o’clock, balanced by the tourbillon at 6. The movement is finished to haute horlogerie standards and visible through the sapphire caseback.