Omega Speedmaster '57 Omega Co-Axial Chronograph 41.5 MM

REF : 331.20.42.51.02.001

"Product added 12/22/14 in our database "(1993 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

Jewels

54

Frequency

28,800 VpH (4 Hz)

Caliber

Omega 9300

Movement

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

Oscillator

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

Case

Shape

Round

Diameter (in mm)

41.5

Material

18-carat Yellow Gold, Stainless Steel

Crystal

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

Model Case

Brushed/satin finished stainless steel case with polished finished beveled edges, Transparent case back with sapphire crystal

Water Resistance

10 bar (100 metres / 330 feet)

Bezel

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

Winding Crown

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

Dial

Color

Silver

Indexes

Indices

Details

Applied yellow 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, Yellow gold OMEGA logo below 12 o'clock, Yellow gold toned hands, the hour & minute hands with luminescent fill

Bracelet

Clasp

Push Button Foldover Clasp

Material

Stainless steel and 18-carat yellow gold

Bracelet

Bracelet with brushed finished stainless steel outer links and polished finished 18-carat yellow gold 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

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