"The Omega Speedmaster Professional, otherwise known as the "Moonwatch", is a manual winding chronograph introduced in 1957 and made famous by its selection by NASA for the Apollo Program. The Omega Speedmaster was the first watch worn on the moon, as Buzz Aldrin wore his Speedmaster 145.012 fitted with the Omega 321 caliber on 20 July 1969. It is the only watch flight-qualified for EVA use by NASA. It is also the watch chosen for use in outer space by the Russian space agencyNPO Energia.
The Omega Speedmaster was re-certified in 1972 and in September 1978, for the Space Shuttle missions.
Today, all NASA-issued wristwatches are government property and must be turned in once the astronauts return to Earth. Astronauts are permitted to check out the watches before launch and take them home to familiarize themselves with the watch’s operation.
Interesting note concerning "the moon watch" :
The Omega speedmasters engraved "the first watch on the moon" are fitted with 861 movements , and the previous models have only the sea monster logo : anybody might think viewing thoses backs that the speedmasters fitted with the 861 are "the moon watch"
In fact NASA qualification took place in 1965 at this time the 861 movement was not available and the purchasing for the astronauts speedmasters where bought before the 861 introduction. So the Speedmasters of Apollo missions which goes on the moon where not equipped with 861 movement
Very curiously Speedmasters fitted with "the first watch on the moon" engraving are NOT the moonwatches , the previous ones without the engravings ARE the moonwatches ! , refer to the NASA section of this site for more details
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