Seamaster 120M Multifunction Stainless Steel / Blue

In Context

At 37.4 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. 120 m is genuine swimming resistance — more than the shape of this watch suggests it would need.

It is quartz, so it will hold time far more closely than any mechanical watch here, and asks for a battery every few years rather than a service.

2521.81.00 stands on its own in this catalogue — no other reference here shares its base number. It pairs a blue dial with a stainless steel case.