Watch Specifications:

Stamped on the back of the watch:

WATCH,WRIST:GENERAL PURP.
MIL-W-46374E
6645-00-066-4279 <----- NSN Number
38776
25
384A
54-28526-01E
DLA400-91-C5091
APR 1991
DISPOSE RAD. WASTE
U.S.

Movement: Swiss mechanical non 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: 34mm diameter, 40mm lug to lug, 

11mm thick with 16 mm lugs
Running time: Last 42 hours on 1 full wound
Accuracy: +-90seconds per month

Genuine military watch made by Marathon.

Comes totally 100% NEW IN BOX!.

Unopened, unused, unwound and unworn.

Complete with instructions and original packaging.

Looks similar in appearance and dimension to the normal brown box Marathon MIL-W-46374E

But these watches comes in a RED BOX. This is a highly collectible and sort after version of the Marathon 46374E. With a different NSN number. These watches comes in very limited quantities and were issued only in 1990. Comes complete with instructions and original packaging.

Affordable and highly accurate with a genuine Swiss maintainable mechanical movement. Movement used in watches costing hundreds more.

Great for anyone who wants a "beater" and yet presentable watch. 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.

The picture below shows how it looks like in darkness.