Casio G-Shock watches were worn by Ethan Hunt in all three Mission Impossible films. In 2006 to commemorate the release of Mission Impossible III Casio released a special limited edition version of the model worn in Mission Impossible 3, the Casio G Shock MTG-910D.
Its an atomic, solar-powered model that is water resistant to 200 meters, and world-time for 30 cities. The limited edition version came in a special M3 tin and with a specially engraved back.
In Mission Impossible 1 the Casio G Shock DW-5300 was worn and in Mission Impossible 2 it was a G-shock DW-6900-1V .