The Omega Speedmaster 3815.76.31 has a 'reduced' case and a bezel set with diamonds, with the self-winding caliber 3220 inside. It includes a mother-of-pearl dial.
Movement Type
Automatic Chronograph
Caliber
3220Jewels
47
Reserve
42
Frequency
28800
Hands
Small Seconds
Shape
Round
Lug Distance
18.00 mm
Material
Stainless Steel
Glass
Plexi
Diameter
39.00 mm
Water Resistance
100.00 m
Dial Color
Black
Material
MOP
