Millenary Quadriennium

In Context

At 47 mm this is exceptionally large for something worn on a wrist, closer to a pocket watch given lugs. At 15.5 mm it is a tall case, and it will catch on a cuff. 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. Rated to 20 m, it is protected against rain and splashes and nothing beyond that.

The movement is hand-wound, so winding it becomes part of the day rather than something the watch does for you. 168 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.

26149OR.OO.D803CR.01 stands on its own in this catalogue — no other reference here shares its base number. It pairs a white dial with a pink gold case.

Audemars Piguet's caliber 2905/B01 is a hand-wond movement with AP escapement with double hairspring, a double barrel, a four-year calendar, and a lubricant free pallet.