AP 3120

About the Audemars Piguet AP 3120

It was Audemars Piguet's first self-winding movement designed and built entirely in-house for series production, and it set the pattern for what followed: a full-size rotor rather than the micro-rotor of the ultra-thin calibers, a beat of 21,600 vph, 40 jewels and a 26.6 mm diameter at 4.26 mm high. The Royal Oak 15300 of 2005 at 39 mm and the 15400 of 2012 at 41 mm both ran it, and it served as the base for the 3126/3840 Offshore chronograph and the 3132 double-balance openworked movement.

In the library it sits under 61 Royal Oak references, 21 Royal Oak Offshore Divers, 17 Jules Audemars and 12 Millenarys. Cases run from 36 mm to 47 mm, with 37 mm, 39 mm and 42 mm the most common. 21 are limited editions.

The 4302 replaced it in the 41 mm Royal Oak in 2019, and the 5900 in the 37 mm in 2022.