Seamaster Aqua Terra 150m Co-Axial 41.5 Stainless Steel / Black / Bracelet / >15'000 Gauss

In Context

At 41.5 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. The case back is open, so the movement is visible without taking the watch apart, and the sapphire crystal will resist everything short of deliberate abuse. 150 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. 60 hours of reserve is enough to set it down on Friday evening and find it still running on Monday. At 25,200 vph the seconds hand advances 7 times a second.

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

Omega's first movement to be certified resistant to magnetic fields greater than 1.5 tesla (15’000 gauss), with technology developed by a team of ETA, ASULAB, Nivarox FAR and OMEGA Engineers.

1 other watch in the library runs the Omega 8508.

Omega

Seamaster Aqua Terra 150m Co-Axial 41.5 Stainless Steel / Black / >15'000 Gauss

231.12.42.21.01.001 · 41.5 mm