SIGNED OMEGA, SPEEDMASTER PROFESSIONAL, REF. ST 145.022, MOVEMENT NO. 48'256'958, CIRCA 1975

In 1962 NASA purchased watches from 10 different brands and subjected them to testing for use by astronauts. By 1964, six manufacturers were still in the running, and in 1965 NASA announced that Omega had passed all tests and was chosen for space missions. The first Speedmaster to land on the moon was on the wrist of Buzz Aldrin, actually the second man to step onto the moon.