Marathon Tritium SAR Diver’s Watch
The TSAR (Tritium Search and Rescue) watch was designed and manufactured for diving or SAR (Search and Rescue) use by the Marathon Watch Company (a Canadian company). It is the latest version of the Canadian SAR watch and was manufactured under contract to the Canadian and U.S. governments (NSN: 6645-21-558-0133Q) for issue to SAR personnel. It’s in use by NASA divers (NSN: 6645-20-001-9382). Marathon has been around since 1939 supplies government, commercial and military clients worldwide and is currently the only contracted manufacturer of gaseous tritium watches to the U.S. government. Their manufacturing plant is in Switzerland, where the TSAR is made. The TSAR, and other government-issue watches is available through County Comm. It is made in limited quantities and each watch is serial numbered.