Omega. A stainless steel chronograph wristwatch with bracelet, Ref. 105.012-66, ‘Pre Moon’ Speedmaster Professional, circa 1966.
Movement: cal. 321, manual winding, 17 jewels, no. 24950100, dust cover.
Dial: black, baton indexes, engine-turned subsidiary dials for constant seconds, 30-minute and 12-hour registers.
Case: stainless steel, bezel calibrated for tachometer scale, screw-down back, case stamped HF for the casemaker Huguenin Frères, later Speedmaster bracelet.
Signed: case, dial, movement and bracelet.
Dimensions: diameter 42mm, bracelet circumference approximately 200mm
£3,000-£5,000

The Speedmaster ref. 105.012 was released by Omega in 1964. This is the exact reference worn by the NASA astronauts, including Neil Armstrong during the Apollo II mission when he became the first person to walk on the moon on 20th July, 1969.
This watch includes early features, such as, the ‘dot over ninety’ bezel and ‘pre moon’ case back with the original Speedmaster logo.