A large watch on a light strap makes a lot of sense in the field. The Marathon JDD YAMAM, reference WW194021SS-0711, mounts the 46mm Jumbo Day/Date automatic diver on an 11-inch black nylon strap, trimming weight while keeping the watch firmly in place.

Nylon has been the standard for tactical watches for decades, and for good reason. It is quick-drying, quiet against gear and breathable in hot climates, and the one-piece design threads under the case so the watch stays on even if a spring bar lets go. Set against a black dial and brushed steel, it gives the JDD a lean, operational look that suits the YAMAM edition and its connection to the Israel Police special unit.

That connection shows in the day wheel, which reads in English and Hebrew rather than the standard English and French. The rest of the watch is pure JDD: a 316L stainless steel case measuring 46mm wide and 18mm thick, a screw-down crown flanked by guards, and 30 ATM of water resistance. The Sellita SW220 automatic movement, with 26 jewels and Incabloc shock protection, offers roughly 41 hours of reserve. Tritium gas tubes illuminate the hands and markers, a MaraGlo pip sits on the 120-click unidirectional bezel, and a domed sapphire crystal protects it all.

Marathon WW194021SS-0711: YAMAM JDD on Nylon

• Reference: WW194021SS-0711
• Edition: YAMAM, English/Hebrew day wheel, black dial
• Case: 46mm 316L steel, 18mm, 55mm lug to lug
• Movement: Sellita SW220 automatic with Incabloc
• Water resistance: 30 ATM
• Crystal: domed sapphire
• Bezel: unidirectional, 120 clicks, glove-sized
• Lume: tritium tubes, MaraGlo pip
• Strap: 11" black nylon, 22mm

Lighter on the wrist, just as tough underneath.