The strap changes a watch's personality, and the DefStan gives the Arctic Steel Navigator a distinctly military bearing. Marathon reference WW194001SS-0503 is the 41mm SSNAV with a sterile white dial, Swiss PreciDrive quartz and an 11-inch DefStan nylon strap.

DefStan straps take their name from British defence standards, and Marathon's version is fitted with Parkerized hardware, a matte grey phosphate finish that cuts glare and resists wear. Against polished steel and a white dial, that subdued buckle and keeper add a quiet contrast that looks right whether you are in the field or in town.

The watch itself carries a story worth knowing. Marathon designed the original Navigator with Kelly Air Force Base in 1986 for U.S. Air Force aircrews, and after decades away, the stainless steel version made its comeback in 2023. This edition uses 316L steel, an 11mm profile, a screw-down crown for 10 ATM water resistance and a sapphire crystal. Its 12-hour bezel turns both ways in 90 clicks, ideal for keeping a second time zone in view. The ETA F06.412 PreciDrive movement is thermocompensated for accuracy of roughly ten seconds a year, and tritium illumination keeps the Arctic dial readable after dark.

Arctic Steel Navigator on DefStan: Specs

• Reference: WW194001SS-0503
• Case: 41mm, 316L stainless steel, 11mm
• Movement: Swiss ETA F06.412 PreciDrive quartz (about ±10 sec/year)
• Water resistance: 10 ATM
• Crown: screw-down
• Crystal: sapphire
• Bezel: bi-directional 12-hour, 90 clicks
• Dial: Arctic white, sterile, tritium lume
• Strap: 11" black DefStan nylon with Parkerized hardware, 20mm lugs

A white-dial pilot's watch with a field-issue edge.