Speedmaster Perpetual Calendar Yellow Gold / Champagne /

In Context

At 39 mm it sits just under the modern norm — the band that suits the widest spread of wrists. The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse. 100 m is genuine swimming resistance — more than the shape of this watch suggests it would need.

The movement winds itself from the motion of your wrist. 44 hours of reserve carries it overnight, but not through a weekend in a drawer. At 28,800 vph the seconds hand advances 8 times a second.

3650.10.20 stands on its own in this catalogue — no other reference here shares its base number. It pairs a silver dial with a yellow gold case. It was a limited edition. Beyond the time it carries a chronograph and a perpetual calendar.

Omega caliber 1160 is a self-winding caliber. The base movement is the ETA 2892-A2, which is fitted with a module for the perpetual calendar and chronograph.