Vintage Hamilton GG-W-113 Pilot Military Issue 1979 Manual Wind Wrist Watch

Up for sale we have a circa 1979 GG-W-113 Military Issue Pilot's watch manufactured by Hamilton. Watch is housed in a one-piece parkerized steel case. Movement is a 17 jewel model H.W.C. (Hamilton Watch Company) mechanical (wind up) movement. This movement was made in Switzerland and is also known as the ETA 2750. This is a high beat movement which is 21,600 bph. 

 The watch has been oiled, and timed on our timing machine and is running and keeping excellent time to within 30 seconds a day with full wind.  Watch winds and sets fine and the Hack function works properly. Watch crown has been replaced.

Markings on back include:

WRIST WATCH

GG-W-113

FED. STOCK NO.N6645-00-066-4279

MFG PART NO. 39986

CONT. NO. GS-03S-48452

DATE MAY 1979

SERIAL NO 312367

U.S.

Watch length: 41.5 mm lug to lug

Watch width: 34 mm (not including crown)

Comes with an 18mm 9.25" long black nylon strap 

NOTE: This MIL SPEC was designed for highly accurate timepieces intended for use by pilots and navigators. This distinguished it from more common field watches used by general infantry.