For collectors of military-issue watches, the dial markings matter, and this listing lets you choose. The Marathon Pilot's Navigator WW194001BK-0817 is the 41mm NAV offered with either a Standard-Issue dial or a dial reading "U.S. Government," on a black DefStan or ballistic nylon strap, all powered by Swiss quartz.

The Standard-Issue version keeps things simple, with no government markings and only the Marathon name. The U.S. Government version prints that designation at the top of the dial and carries matching government markings on the caseback, tying it directly to the Navigator's service history. That history began in 1986, when Marathon partnered with Kelly Air Force Base to equip U.S. Air Force pilots with a light, readable flight instrument. The result was a composite shell case that weighs next to nothing, a sapphire crystal, and a bi-directional 12-hour bezel that aircrews used to keep track of a second time zone.

Illumination comes from tritium gas tubes on the markers, hands and bezel pip, so the dial stays visible through a night flight or a power outage without ever being exposed to light first. The Swiss ETA F06.115 HeavyDrive quartz movement keeps maintenance minimal, and the battery hatch on the case makes changes easy. Pick the DefStan nylon with Parkerized hardware for an authentic issued look, or the one-piece ballistic nylon for extra security on the wrist.

Navigator WW194001BK-0817 at a Glance

• Model: Marathon NAV (Pilot's Navigator), no date
• Reference: WW194001BK-0817 and related variants
• Case: 41mm lightweight composite shell, 11mm, 20mm lugs
• Movement: ETA F06.115 HeavyDrive Swiss quartz
• Water resistance: 6 ATM
• Crystal: sapphire
• Lume: self-powered tritium gas tubes
• Dial: matte black, Standard-Issue or U.S. Government markings
• Strap options: black DefStan nylon with Parkerized hardware, or black ballistic nylon

Choose your markings and your strap; the mission-ready Navigator underneath stays the same.