The 'Moon Flag' ref. 3574.50.00 is an abandoned Speedmaster Professional project by Omega, with unclear details. Limited to just one unit.
Movement Type
Manual Chronograph
Caliber
1861Jewels
18
Reserve
48
Frequency
21600
Hands
Small Seconds
Shape
Round
Lug Distance
20.00 mm
Material
Stainless Steel
Glass
Plexi
Diameter
42.00 mm
Water Resistance
50.00 m
Dial Color
Black