Anyone who owns more than one mechanical watch knows the ritual of resetting a stopped automatic. The Marathon 46mm OSAR-D Arctic Edition WW194037SS-2502 makes rotation easier, thanks to a Sellita SW600 b movement with a 62-hour power reserve inside a white-dial Swiss automatic dive watch on a stainless steel bracelet.

Sixty-two hours is a meaningful number for collectors. It means this OSAR-D can sit out a weekend while you wear something else and still be running when you reach for it again, sparing you the date-setting routine. The SW600 b also brings 24 jewels and Incabloc shock protection, and the 46mm OSAR-D is the first watch in Marathon's SAR family to use it. That alone makes it a notable piece for anyone following the brand.

The Arctic dial earns its place in a collection, too. White was chosen for legibility in bright and snowy conditions, and on this large dial it creates a crisp contrast with the black hands, geometric indices and 1.5x cyclops date at 3 o'clock. MaraGlo lume glows on the indices, hands and bezel pip after dark. The brushed 316L case, 17mm thick with 22mm lugs, carries a sapphire crystal, a guarded screw-down crown, a 120-click bezel and 300 meters of water resistance.

Collector Specs: WW194037SS-2502

• Model: Marathon 46mm OSAR-D Arctic Edition
• Movement: Swiss Sellita SW600 b automatic, 24 jewels, 62-hour reserve
• Case: 46mm 316L steel, 17mm thick, 55mm lug to lug
• Water resistance: 300 meters
• Crystal: sapphire
• Date: 3 o'clock under 1.5x cyclops
• Lume: MaraGlo
• Bracelet: stainless steel, 22mm

An easy watch to rotate, and a hard one to put away.