AP 3126 / 3840

About the Audemars Piguet AP 3126 / 3840

Audemars Piguet built the Offshore's chronographs as modules for most of the collection's history. The 3120 supplies the going train, a 22-carat gold rotor on ceramic bearings and a 60-hour reserve on its own; the 2840 module adds the cam-operated chronograph and its counters, which is why the movement carries 59 jewels and why the reserve falls to 50 hours. It runs at 21,600 vph and is 29.92 mm across. The arrangement is what let the Offshore run so many dial and material variants, because the module is indifferent to what is around it.

Every reference here is a Royal Oak Offshore: 70 in the 42 mm case, including the 26470 of 2014, 42 in the 44 mm of 2010 and 8 in the 48 mm. 59 of the 123 are limited editions.

The 2326/2840 is the earlier Offshore chronograph with the same module on a Jaeger-LeCoultre base, and the 4401 the integrated in-house flyback that replaced both.