Seamaster Planet Ocean 600M Co-Axial 45.5 Master Chronometer GMT Deep Black Sedna

In Context

At 45.5 mm it is a large watch — well above this catalogue’s 40 mm median, and enough to dominate a narrow wrist. 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. 600 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.

215.63.46.22.01.001 stands on its own in this catalogue — no other reference here shares its base number. It pairs a black dial with a ceramic case. Introduced in 2016. Beyond the time it carries a gmt.

Caliber 8906 is the GMT version of caliber 8900, which was the first of Omega's movements to receive the new METAS cerfication. Resistant to magnetic fields of over 15'000 Gauss. Free-sprung balance with silicon balance spring. Two barrels mounted in series.

12 other watches in the library run the Omega 8906.

Omega

Seamaster Planet Ocean 600M Co-Axial 45.5 Master Chronometer GMT Deep White Sapphire

215.98.46.22.05.001 · 45.5 mm

Omega

Seamaster Planet Ocean 600M Co-Axial 45.5 Master Chronometer GMT Deep Black Red

215.92.46.22.01.003 · 45.5 mm

Omega

Seamaster Planet Ocean 600M Co-Axial 43.5 Master Chronometer GMT Stainless Steel / Black White / Alligator

215.33.44.22.01.001 · 43.5 mm

Omega

Seamaster Planet Ocean 600M Co-Axial 43.5 Master Chronometer GMT Stainless Steel / Black White / Bracelet

215.30.44.22.01.001 · 43.5 mm