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 programme following a new series of harsh tests.

The Speedmaster was later subjected to yet another gruelling test on board the Russian space station MIR between July 1993 and July 1994. The success of this exceptional test is attested by a certificate initialled by the MIR crew. The OMEGA Speedmaster had become the most tested watch in the world.

Russia's pioneering space station MIR was again used as an orbiting test laboratory in 1998 for OMEGA's X-33 multifunction chronograph. After successful completion of the tests, MIR also offered a unique opportunity for presenting the watch to the public via a live satellite link-up with the Houston Space Center.

The Speedmaster X-33 is now flight-qualified by both NASA and the Russian space agency and is therefore included in the standard equipment issued to all astronauts and cosmonauts. However, the legendary OMEGA Speedmaster Professional also remains an item of standard equipment and is still worn for extra-vehicular activity.