A 46mm dive watch on rubber is a classic combination for a reason. The Marathon 46mm OSAR-D WW194037SS-2030-KIT pairs a large black dial with a 3-piece rubber strap kit, giving this Swiss automatic diver a lighter, more water-ready feel for days on the boat, at the beach or under the surface.

On a big watch, strap choice changes the experience. Rubber trims weight compared with steel, flexes as the wrist swells in heat or tightens in cold water, and rinses clean in seconds. Marathon's 3-piece FKM rubber strap kits are made in La Chaux-de-Fonds, where the company assembles its watches, and the black strap fits the 22mm lugs of the 46mm case. The result feels secure and comfortable on larger wrists even when worn over a wetsuit.

Under the dial is the Sellita SW600 b automatic movement, Marathon's first SW600 b in a SAR model, with 24 jewels, Incabloc and a 62-hour power reserve. The black Type I dial wears MaraGlo on large geometric indices, hands and the bezel pip, and a 1.5x cyclops enlarges the date at 3 o'clock. The 46mm case is brushed 316L stainless steel, 17mm thick and 55mm lug to lug, sealed by a guarded screw-down crown to 300 meters beneath a sapphire crystal.

Marathon 46mm OSAR-D on Rubber: Specifications

• Reference: WW194037SS-2030-KIT
• Case: 46mm 316L steel, 17mm thick, 55mm lug to lug
• Movement: Sellita SW600 b Swiss automatic, 62-hour reserve
• Water resistance: 30 ATM / 300m / 1000ft
• Crystal: sapphire with 1.5x date cyclops
• Lume: MaraGlo
• Bezel: unidirectional, 120 clicks, glove-friendly
• Strap: black 3-piece FKM rubber kit, 22mm

Big on the wrist, light on its feet, and at home in the water.