Seamaster Aqua Terra 150M Master Chronometer 43 Worldtimer Sedna Gold / Silver / Alligator

In Context

At 43 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. 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.

220.53.43.22.02.001 stands on its own in this catalogue — no other reference here shares its base number. It pairs a silver dial with a sedna gold case. Beyond the time it carries a gmt.

The 8900 with a world-time layer: a 24-hour disc turns at the centre of the dial against a ring of reference cities, so the Aqua Terra Worldtimer reads every zone at once. Like the rest of the family it is a Master Chronometer, tested by METAS to hold zero to plus five seconds a day after exposure to 15,000 gauss, and it runs a co-axial escapement.

2 other watches in the library run the Omega 8939.

Omega

Seamaster Aqua Terra 150M Master Chronometer 43 Worldtimer Platinum / Enamel / Alligator

220.93.43.22.99.001 · 43 mm

Omega

Seamaster Aqua Terra 150M Master Chronometer 43 Worldtimer Sedna Gold / Silver / Bracelet

220.50.43.22.02.001 · 43 mm