Marathon 46mm OSAR-D Diver's Auto Arctic Maraglo Type I WW194037SS-2501

The Marathon 46mm OSAR-D Diver’s Auto Arctic MaraGlo Type I (ref. WW194037SS-2501) is a full-scale professional tool watch built for extreme visibility and uncompromising durability. Developed from Marathon’s original SAR watches issued to Canadian Search and Rescue technicians in the early 2000s, the Arctic edition adds a high-contrast white dial specifically designed for bright, snowy, and low-contrast environments where standard black dials can become harder to read. The oversized 46mm brushed stainless steel case, deeply knurled bezel, and screw-down crown give the watch an unapologetically industrial feel—less luxury diver, more operational equipment.

Under the hood, the 46mm OSAR-D is powered by the Swiss Sellita SW600 b automatic movement with Incabloc shock protection, making it the first SAR-series Marathon to receive the upgraded caliber with an extended 62-hour power reserve. The watch features 300 meters of water resistance, sapphire crystal, magnified date window, and upgraded MaraGlo illumination for improved nighttime legibility. Unlike many oversized divers that exist purely for aesthetics, the OSAR-D Arctic feels purpose-driven in every detail—from the high-visibility dial to the thick, overbuilt case construction.

Reference: WW194037SS-2501

Bracelet: Stainless Steel Bracelet

Case: 46mm x 17mm Thickness x 55mm lug to lug - Stainless Steel

Water Resistance: 300m (30ATM)

Lug Width: 22mm

Movement: Sellita SW600 b with Incabloc® Shock Absorber - Automatic

Dial: Arctic White Dial - MaraGlo

Calendar Type: Date w/ 1.5x Magnification

Functions: HMS, Date

Box and Papers: Inner/outer boxes, and warranty card

Crystal: Sapphire

Bracelet size: 7.75"

New

Marathon Watch Company has built a reputation as one of the most trusted military watch brands in the world. Founded in 1939, Marathon specializes in Swiss-made tool watches designed specifically for government and military use.

Unlike many luxury watch brands, Marathon focuses on function over flash. The brand has supplied U.S. and Allied forces with durable, high-performance timepieces for decades. Their watches are known for tritium gas tube illumination, allowing constant visibility in low-light conditions—no charging required.

Popular models like the Marathon GSAR (Government Search and Rescue) and TSAR (Tritium Search and Rescue) are built to withstand extreme environments, making them a go-to choice for divers, pilots, and professionals.

Today, Marathon continues to produce military-issued watches, combining Swiss craftsmanship, rugged durability, and tactical design. If you're searching for a reliable tool watch with real military heritage, Marathon stands in a class of its own.