As space exploration continued to break through new frontiers, the Omega Speedmaster Professional was again selected by NASA in 1978 as its official chronograph for the new Space Shuttle programme 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. The Omega Speedmaster Professional has become the most tested watch in the world.
