Seamaster 300 Co-Axial Master Chronometer Yellow Gold / Malachite

In Context

At 41 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. At 14.65 mm it is a tall case, and it will catch on a cuff. 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. 300 m is a professional diving rating, far past any demand a wrist is likely to make of it.

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.

234.63.41.21.99.001 stands on its own in this catalogue — no other reference here shares its base number. It pairs a green dial with a yellow gold case. Introduced in 2018.

Caliber 8913 is caliber 8901 (luxury finish version of 8900) without its date display.

4 other watches in the library run the Omega 8913.

Omega

Seamaster 300 Co-Axial Master Chronometer Platinum / Malachite

234.93.41.21.99.001 · 41 mm

Omega

Seamaster 300 Co-Axial Master Chronometer Platinum / Lapis Lazuli

234.93.41.21.99.002 · 41 mm

Omega

Seamaster 300 Co-Axial Master Chronometer Yellow Gold / Lapis Lazuli

234.63.41.21.99.002 · 41 mm

Omega

Globemaster Platinum / Silver

130.93.39.21.99.001 · 39 mm