Speedmaster Moonwatch Co-Axial Chronograph

Model #: 311.

Mens Watch | Automatic Movement

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RRP: £9,760


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Warranty TheWatchSource 5 Year Warranty
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Watch Specifications

Brand Omega
Series Speedmaster Moonwatch Co-Axial Chronograph
Model Number 311.
Size Mens
Case Material Ceramic
Dial Colour Grey
Bracelet/Strap Alligator/Crocodile Leather Grey
Clasp Tang Buckle
Movement Automatic - Chronometer
Bezel Fixed
Screw-down Crown No
Crystal Anti-Reflective Scratch Resistant Sapphire
Case Back Transparent
Water Resistance 50m/150ft
Diameter 44.25mm
Case Thickness 16.50mm

Watch Description


Brushed/Satin finished grey ceramic case with polished finished beveled edges.

Polished grey ceramic crown with the omega logo engraved.

Polished grey ceramic chronograph buttons.

Polished grey ceramic bezel with an engraved tachymeter scale with white Super-Luminova fill.


Light grey colored, Sand-blasted platinum 950 main dial & sub-dials.

Sub-dials surrounded with raised grey rims with printed indexes.

Applied blackened white gold polished index hour markers with luminescent fill.

Printed minute/seconds & fractions of a second track.

Dial engraved with Pt950 directly above the center.

Polished blackened white gold hands with luminescent fill.

Chronograph Stopwatch functions:

Large red tipped central seconds hand counter.

Minute & hour counters are combined into a single sub-dial located at the 3 o'clock position.

Small continuous running seconds hand sub-dial located at the 9 o'clock position.

Date window displayed at the 6 o'clock position.

Domed sapphire crystal on front & back.

Case back engraved with "GREY SIDE OF THE MOON - Si 14 - ZrO2/ZrC"

Polished grey zirconium oxide ceramic pin buckle.


Omega caliber 9300, beats at 28,800 vph, contains 54 Jewels & has an approximate power reserve of 60 hours - thanks to its twin barrels mounted in series.

Column-Wheel Chronograph - column wheel is visible from the transparent case back.

The movement features Omega's "Si 14" silicon balance spring, which contributes to the movements outstanding resistance to shock and to environmental disturbances and thus, to the watch’s chronometric performance.

The movement also features the now-standard Co-Axial Escapement which contributes to greater precision, stability & durability. The Co-Axial escapement has less friction & reduces the necessity of lubrication thus reducing the time required between servicing.

The combination of the SI 14 balance spring & the Co-Axial escapement makes for an extremely reliable & stable movement.

The rotor & visible bridges are decorated with a unique "arabesque" wave design finish.

This Watch has an alternate part number:

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