AP 3132

About the Audemars Piguet AP 3132

The idea is inertia. Two balance wheels and two hairsprings on one staff double the oscillating mass of a single balance the same size, so the assembly is steadier against shocks and positional error, and the two springs correct each other's asymmetry as they breathe. Audemars Piguet patented the arrangement and opened the movement to show it, which is why every 3132 is skeletonised. It runs at 21,600 vph with a 45-hour reserve, 38 jewels and a 26.6 mm diameter.

Every reference here is a Royal Oak Double Balance Wheel Openworked: 19 in the 41 mm 15407 and 14 in the 37 mm 15466, in steel, pink gold and white gold. One is a limited edition.

The 3120 is the base underneath, and the 2950 the flying tourbillon that is the Royal Oak's other exposed movement.