The Omega Speedmaster Professional Alaska Project IV, a series of 20 prototypes made in 1979 for NASA Space Shuttle pilots, is based on the ST 186.004 and uses tritium strips behind the display for illumination. Limited to 20 units.
Shape
Round
Lug Distance
20.00 mm
Material
Stainless Steel
Glass
Plexi
Thickness
11.00 mm
Diameter
38.00 mm
Water Resistance
50.00 m
Dial Color
White
