This classic field watch, reference 31101, meets the standards described  in detail for the watch case construction, shape and size on page 31 of military specifications MIL-W-46374F ( hence the first two digits of the watch reference).

DIMENSIONS

38mm case size, 11.95mm thickness, 45mm lug to lugs, 100m water resistance, Hacking, Automatic, scratch-resistant Sapphire crystal with five layers of anti-reflective coating, 24-hour time around dial center.

FEATURES

Designed and built for MIL-W-46374F, Limited edition to 500 pieces numbered, crown at 3H filled with soil from US military forts, glow in the dark old radium luminova hands and numerals. Comes with 2 straps: one elastic Nato and one strap made of recycle material.