Omega 311.

311. : Omega Speedmaster Moonwatch Co-Axial Orange Gold / White

Speedmaster Moonwatch Co-Axial Orange Gold / White

Brand: Omega
Family: Speedmaster Automatic / Quartz
Reference: 311. (aka: 31163445104001)
Name: Speedmaster Moonwatch Co-Axial Orange Gold / White
Limited: No


Material: Orange Gold
Bezel: Tachymeter
Glass: Sapphire
Back: Open
Shape: Round
Diameter: 44.25 mm
Lug Width: 21.00 mm
W/R: 100.00 m


Color: White
Indexes: Stick / Dot
Hands: Stick


Special version of the column wheel, co-axial caliber 9300 for use in gold watches.

Self-winding chronograph with Si14 Silicium balance spring, co-axial escapement, two barrels, column wheel and vertical clutch.

Since 2015 certain watches containing this movement may carry the 'Master Chronometer' certification, indicating they have gone through the METAS testing cycle

Base: Omega 9300
Reserve:60 h
Frequency:28800 bph
Time:Hours, Minutes, Small Seconds
Chronograph:Chronograph, Column wheel
Additionals:Chronometer, Co-Axial Escapement


The Speedmaster is one of the enduring classics of the wonderful world of watches. The Speedmaster Moonwatch Co-Axial shares its classic looks with the Speedmaster Professional, but uses a larger case and state-of-the-art automatic movement with co-axial escapement. This version (reference 311. has a Orange-gold case, a white dial and bezel, and a white alligator strap.

This version was never put into production as far as we know.