Royal Oak 25831 Tourbillon 25th Anniversary Pink Gold

In Context

At 40 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse.

The movement winds itself from the motion of your wrist. 54 hours of reserve is enough to set it down on Friday evening and find it still running on Monday. At 21,600 vph the seconds hand advances 6 times a second, the slower and more audible rate of an older design.

25831OR.O.1110OR.01 stands on its own in this catalogue — no other reference here shares its base number. It pairs a ivory dial with a pink gold case. It was a limited edition. Introduced in 1997. Beyond the time it carries a tourbillon.

Self-winding movement with tourbillon escapement and power reserve indicator. Hammer-winding system; crown fitted on the back. Titanium tourbillon case.

1 other watch in the library runs the Audemars Piguet AP 2875.

Audemars Piguet

Jules Audemars 26143 Tourbillon Openworked Platinum

26143PT.OO.D005CR.01 · 41 mm