Watch Specifications:

Stamped on the back of the watch:

WATCH, WRIST NAVIGATORS
MIL-PRF-46374F
6645-01-364-4042
26
54-28526-01E
SP0440-00-D-0168
SEP 1997
38776

U.S.

Movement: Swiss quartz hacking movement 
Luminance: Tritium gas-tube luminescence 
Case: Black Fiberglass/composite case
Crystal: Raised acrylic domed crystal 
Strap: Black nylon issue strap

Buckle: Black anodized stainless steel buckle
Water resistance: Water resistant
Dimensions: 44mm diameter, 48mm lug to lug, 

20mm lugs
Accuracy: +-60seconds per month

The first composite navigators made by Marathon. This is one of the earliest production date that can be found. Very very rare. Almost impossible to find at all.

Comes totally 100% NEW IN BOX!.

Unopened, unused, unwound and unworn.

Complete with instructions and original packaging.

Has the Marathon name and "U.S. Government" wording on it. Superseded by the latest G specification navigators. These MIL-W-46374F specification navigators are no longer in production. Once sold out will be gone for good.

All watches will be fitted with a new battery.

Built for the military so be assured of its durability. Self-illuminating Tritium vials used for each hour marker and the hands makes usage in darkness easy. Tritium vials glows in darkness for days. Unlike modern luminous watches.