Omega Speedmaster '57 Omega Co-Axial Chronograph 41.5 MM

REF : 331.50.42.51.02.002

"Product added 12/22/14 in our database "(2021 Days)

Watch info

Movement

Precision

Officially Certified Swiss Chronometer (COSC)

Power Reserve

60 Hours

Winding

Bidirectional automatic winding

Functions

Chronograph, Hours, minutes, small seconds, and date, Tachymeter scale

Jewels

54

Frequency

28,800 VpH (4 Hz)

Movement

Self-winding chronograph movement with column wheel mechanism and Co-Axial Escapement

Caliber

Omega 9301

Oscillator

Free sprung-balance with "Si 14" silicon balance spring

Case

Shape

Round

Diameter (in mm)

41.5

Material

18-carat Red Gold

Crystal

Domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides

Model Case

Brushed/satin finished 18-carat red gold case with polished finished beveled edges, Transparent case back with sapphire crystal

Water Resistance

10 bar (100 metres / 330 feet)

Winding Crown

Polished 18-carat red gold crown with notched edge for enhanced grip

Bezel

Fixed, brushed finished 18-carat red gold bezel with engraved and black-filled tachymeter scale

Dial

Color

Silver

Indexes

Indices

Details

Applied red gold index hour markers with luminescent fill, Fine printed black minute, seconds and fractions of a seconds track around the outer rim, Flat silver main dial, Recessed silver sub-dials with a fine concentric circular pattern finished rims & flat center, Red gold OMEGA logo below 12 o'clock, Red gold toned hands, the hour & minute hands with luminescent fill

Bracelet

Material

18-carat Red Gold

Clasp

Push Button Foldover Clasp

Bracelet

18-carat red gold bracelet with brushed finished outer links and polished finished center links

Complication

Date window displayed at the 6 o'clock position

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

Tachymeter scale on the bezel

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