Audemars Piguet 3126/3840

The AP 3126/3840 is an automatic chronograph caliber manufactured by Audemars Piguet, introduced in 2007 and discontinued in 2019. It combines the in-house AP 3120 base movement with a Dubois-Depraz 2840 module to add chronograph functionality. The caliber was used exclusively in Royal Oak Offshore chronograph references before being succeeded by the in-house caliber 4401.