Omega Speedmaster watches awarded by the NASA astronauts

Which series of Omega watches are awarded by the NASA astronauts and considered contributing most for NASA? It is the Omega Speedmaster that earns OMEGA the "Snoopy Award".

Omega Speedmaster Racing Working Chronograph with Black Dial

As space exploration continued to break through new frontiers, the OMEGA Speedmaster was again selected by NASA in 1978 as its official chronograph for the new Space Shuttle program following a new series of harsh tests.
The Speedmaster was later subjected to additional gruelling tests on board the Russian space station MIR between July 1993 and July 1994. The success of these exceptional endurance tests was attested by a certificate initialled by the MIR crew.
So as to speak, the Omega Speedmaster has become the most tested watch in the world. So if you are looking for most qualified luxury watches, look no further than the Omega Speedmaster. It is the best qualified mens Omega watches that could accompany you for years.