9900

About the Omega 9900

It keeps the 9300's architecture, a column wheel, a vertical clutch, two barrels for 60 hours at 28,800 vph and the combined 12-hour and 60-minute counter at 3 o'clock, and adds the METAS specification: a silicon balance spring on a free-sprung balance, non-magnetic alloys and certification of the cased watch to 15,000 gauss. It is 32.5 mm across with 54 jewels. The 9901 is the version with a gold rotor and bridges, and the 9904 adds a moon phase.

In the library it sits under 19 Planet Ocean chronographs at 45.5 mm, 10 Seamaster Diver 300M chronographs at 44 mm, 9 Speedmaster Racing Master Chronometers at 44.25 mm, 4 Dark Side of the Moons and 2 Speedmaster Pilots. The 45.5 mm case accounts for 19 references and the 44.25 mm for 13.

The 3861 is the hand-wound Master Chronometer chronograph of the Moonwatch, and the 8900 the three-hand movement of the same certification.