The Speedmaster Mark III, the second 'Mark' model, uses a stainless steel 'Flightmaster' case and caliber 1040, making it the first automatic Speedmaster.
Movement Type
Automatic Chronograph
Caliber
1040Jewels
17
Reserve
40
Hands
Small Seconds
Shape
Cushion
Material
Stainless Steel
Glass
Mineral
Diameter
41.00 mm
Water Resistance
60.00 m
Dial Color
Black