Speedmaster '57 Co-Axial Chronograph 41.5mm

Model #: 331.

Mens Watch | Automatic Movement

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RRP: £7,120


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Warranty TheWatchSource 5 Year Warranty
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Watch Specifications

Brand Omega
Series Speedmaster '57 Co-Axial Chronograph 41.5mm
Model Number 331.
Size Mens
Case Material Titanium
Dial Colour White
Bracelet/Strap Calfskin Leather Brown
Clasp Deployant Buckle
Movement Automatic - Chronometer
Bezel Fixed
Screw-down Crown No
Crystal Anti-Reflective Scratch Resistant Sapphire
Case Back Transparent
Water Resistance 100m/330ft
Diameter 41.5mm
Case Thickness 16.5mm

Watch Description

A tribute to the original Omega Speedmaster watch from 1957 with clean-cut designs & straight lugs, presented on a brown leather strap: This watch features:

Brushed/Satin finished titanium case with polished finished beveled edges.

Brown leather strap

Brushed finished bezel with engraved & black filled Tachymeter Scale.


Lacquered white main dial.

Recessed white sub-dials with a fine concentric circular pattern finished rims & flat center

Applied blue toned index hour markers with luminescent fill.

Printed black minute/seconds & fractions of a seconds track.

Blue toned hands, the hour & minute hands with luminescent fill.

Chronograph Stopwatch functions:

Large central seconds hand counter.

Minute & hour counters are combined into a single sub-dial located at the 3 o'clock position. The hour hand & the minute hand are blue - both with luminescent fill.

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

Date window displayed at the 6 o'clock position.

Slightly domed sapphire crystal.


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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