Take it diving. The Marathon Jumbo Day/Date, reference WW194021SS-0130, is a 46mm Swiss automatic dive watch rated to 300 meters, and on its black 3-piece rubber strap kit it is set up for exactly that.

Every detail of the JDD supports time underwater. The oversized unidirectional 60-minute bezel turns only counterclockwise, so an accidental bump can only shorten your planned dive time, never extend it. Its 120 clicks give precise settings, and the grip is large enough to use with thick neoprene gloves. A MaraGlo pip marks the starting point, while tritium gas tubes on the hour markers and high-torque hands stay visible in murky water. The screw-down crown is shielded by crown guards, and a domed sapphire crystal sits over the black dial.

The rubber strap kit is made in La Chaux-de-Fonds from FKM, which handles salt water, chlorine and sun without breaking down, and its 3-piece design lets it wrap comfortably around a wetsuit. Inside the 46mm, 18mm-thick 316L case, a Sellita SW220 automatic with 26 jewels and Incabloc protection powers the bilingual English/French day and date display, with about 41 hours of reserve. Developed to Canadian Government search and rescue requirements, it is as dependable on a reef as it is on land.

Dive-Ready Specs: Marathon WW194021SS-0130

• Reference: WW194021SS-0130
• Case: 46mm 316L stainless steel, 18mm, 55mm lug to lug
• Movement: SW220 Swiss automatic by Sellita, 26 jewels
• Water resistance: 300m / 30 ATM
• Bezel: unidirectional 60-minute, 120 clicks, glove-friendly
• Crown: screw-down with guards
• Crystal: domed sapphire
• Lume: tritium tubes and MaraGlo pip
• Strap: black FKM 3-piece rubber kit, 22mm

A big, honest dive watch that is happiest when it gets wet.