Expedition gear should be oversized, simple to operate and impossible to misread. The Marathon 46mm OSAR-D Arctic Edition WW194037SS-2505 fits that description: a large white-dial Swiss automatic dive watch on a stainless steel bracelet, ready for long trips into bright, cold or wet places.

Out in the field, every feature pulls its weight. The Arctic white dial was chosen for legibility in snow and bright light, and the 46mm size gives the large geometric indices plenty of room. The bezel is sized for gloved hands and turns in one direction with 120 clicks, handy for timing a river crossing, a summit push or a dive. A guarded screw-down crown seals the case to 300 meters, sapphire crystal resists scratches, and a 1.5x cyclops magnifies the date at 3 o'clock so you can keep track of days on the trail.

The movement is a strong partner for remote travel. The Sellita SW600 b automatic winds as you move, needs no battery and stores 62 hours of reserve, while Incabloc shock protection helps it shrug off impacts. After sundown, MaraGlo lume on the indices, hands and bezel pip keeps the time visible around camp. The brushed 316L case is 17mm thick and 55mm lug to lug, with 22mm lugs.

Field Specs: Marathon 46mm OSAR-D WW194037SS-2505

• Dial: Arctic white, large geometric indices
• Case: 46mm 316L stainless steel, 17mm thick
• Movement: Sellita SW600 b Swiss automatic, 24 jewels, 62 hours
• Water resistance: 30 ATM / 300 meters
• Crystal: sapphire, date cyclops at 3
• Lume: MaraGlo
• Bezel: glove-friendly, unidirectional, 120 clicks
• Bracelet: stainless steel, 22mm lugs

Pack it for the long trip and trust it to come home with you.