Dimensions and Specifications
Let's take a look at the physical dimensions and specifications of the Marathon GSAR:
- Case diameter: 41 mm.
- Case thickness: 13.5 mm.
- Edge distance: 47.8 mm.
- Edge width: 20 mm.
- Crown: 6.5 mm, screw-in crown Water resistance: 300 m.
- Weight: 174 g (with a bracelet diameter of 18 cm).
The Marathon GSAR is certified according to ISO 6425 standards, which means that it is truly a tool that has been tested in difficult conditions. While at the same time the shallow and flat back cap, combined with the thick 6mm beige leather, make it stand out on the wrist and it's hard to go unnoticed.
Lighting and dial layout
One of the unique features of the Marathon watches are the tritium tubes that illuminate both the dial and the hands. Tritium is not as bright as the newer LUMINOVA technologies and variants used by other brands, but it is the only material that glows continuously without the need for external charging lighting, making it ideal for low-light conditions. The depth of the tritium tubes requires a thicker case and the raised rehaut provides extra clearance for the hands and dial.
The dial layout is also separate, with 12-hour and 24-hour markings. This dual-time functionality is a nod to the watch's military heritage, making it a practical choice for those who need to keep track of multiple time zones or operate in 24-hour environments.


Suggestions and final thoughts
- The Marathon GSAR is a purpose-built watch tool with a long heritage, based on a case design from the early 2000s.
- The watch has a 41mm diameter, 6mm thick beige and thick sapphire crystal, giving it a distinctive and durable appearance.
- Tritium tubes provide continuous illumination, making the GSAR ideal for low-light conditions, while the dual 12-hour and 24-hour dial layout appeals to military and tactical users.
- While the GSAR is an extremely capable and durable watch, its size and aesthetics may not be the most practical or comfortable choice for everyday use in more formal or professional settings.
Conclusion
Overall, the Marathon GSAR is a reliable and robust watch, ideal for those looking for a tool that can withstand extreme conditions. It has many strengths, but also some weaknesses to consider.
Its distinctive design and heritage make it a special choice for lovers of
military watches
and those who appreciate the construction and history behind a watch.
I hope you enjoyed the review of the Marathon Large Diver's Automatic (GSAR) - 41mm - US Gov . Feel free to share your thoughts in the comments!