Few watch companies can trace a straight line from a 1904 family workshop to watches strapped onto search and rescue divers, but Marathon can. The Marathon TSAR WW194007SS-0009 is that lineage in its most practical form: a 41mm Swiss quartz dive watch with tritium illumination, a black dial and a full stainless steel bracelet.

TSAR stands for Tritium Search and Rescue, and the name is literal. The SAR family was developed to Canadian Government requirements for search and rescue work, which explains the oversized unidirectional bezel you can turn with gloves on, the screw-down crown flanked by guards, and the 300-meter rating. Marathon received its first military order from the Royal Canadian Air Force in 1941, and the company has kept supplying watches to elite members of the Canadian and U.S. militaries ever since. This reference carries that working DNA without asking you to wind or babysit it.

The steel bracelet turns the TSAR into a watch that feels finished and substantial on the wrist, the kind you put on in the morning and forget about until you need to read it in the dark. Self-powered tritium tubes on the markers and hands make that easy at any hour.

Marathon TSAR WW194007SS-0009 Specifications

• Reference: WW194007SS-0009, 41mm Large Diver's Quartz (TSAR)
• Case: brushed 316L stainless steel, about 14mm thick, 48mm lug to lug
• Movement: Swiss ETA F06.115 HeavyDrive high-torque quartz with end-of-life battery indicator
• Water resistance: 30 ATM / 300 meters / 1,000 feet
• Crystal: sapphire
• Illumination: tritium gas tubes on hour markers and hour/minute hands; MaraGlo on bezel pip and seconds hand
• Bezel and crown: unidirectional 60-minute bezel with 120 clicks; screw-down crown with guards
• Dial: black with date at 4:30
• Bracelet: stainless steel, 20mm lug width

A century-old maker, a rescue-grade spec and a movement that simply keeps going: that is the case for this TSAR.