Omega Speedmaster ref. 3875.30.31 has a stainless steel case with a white gold bezel and a silver dial. It runs on caliber 1866, a hand-wound movement featuring chronometer, date, and moonphase.
Movement Type
Manual Chronograph
Caliber
1866Jewels
17
Reserve
45
Frequency
21600
Hands
Small Seconds
Shape
Round
Lug Distance
20.00 mm
Glass
Sapphire
Diameter
42.00 mm
Water Resistance
50.00 m
Dial Color
Silver
Material
Strap
