Barenia Bund Strap for the Marathon GSAR

The Marathon GSAR is a tool watch first, a 41mm military-spec diver that gets worn in the field. This build puts it on a barenia bund strap: a full leather pad that sits between the case and the wrist, sized to the GSAR's 20mm lugs and 48mm lug-to-lug case.

Strap specifications

Why these choices

A bund strap is a pad of leather that runs the full width and length under the watch, so the case never touches skin. It has aviator and military roots, useful when a steel case can get cold or hot in the field, and it gives a tool watch like the GSAR more presence on the wrist. The watch sits on the pad with the strap threaded through underneath.

Barenia is the right leather for this job. It is hot-stuffed with oils, has an equestrian background and is traditionally water-resistant, which matches a dive watch better than a dry dress calf would. Over time it softens and takes on a patina without falling apart.

We built it heavy to suit the watch: a thick stainless buckle, double-side stitching for durability, and a padded pad cut to the 41mm case and 48mm lug-to-lug span. Quick-release spring bars at the 20mm lugs make it easy to take on and off.

FAQ

Can you make a bund strap for the Marathon GSAR? Yes. This one is cut for the 41mm GSAR at a 20mm lug width, with the pad sized to the case so the watch sits centered.

Is a bund strap practical on a dive watch? It is more of a wear-and-feel choice than a dive function, but barenia's water resistance and a heavy buckle hold up well to everyday and outdoor use.

Order this build as a barenia strap, see more barenia leather straps or brown straps, or browse all custom watch straps. Made to order, allow 2-3 weeks to delivery.