WWII HAMILTON Navigation POCKET WATCH 4992B US Army Air Force. X 65mm including bow x 11mm thick. Matte black painted dial with white screen printing. Heavy spade and whip hands, painted white. Keystone chromed base metal case #920113.Exterior Case Back: AN 5740 - MFR'S PART NO. W535ac-40783 - HAMILTON WATCH CO. Interior Case Back: "Keystone - Base Metal - 920113". Case Edge Under Bezel: "000942". USA - 4992B - 22 Jewels - Adj. And 6 Positions - 4C102878. None of this is significant or conspicuous. Otherwise this watch is in excellent all original cosmetic condition with no damages and no significant wear. I detect to no restorations or touch ups. No pry marks, tool marks or scrapes. No significant scratches or rubs. No significant wear to the chrome. The case front and back screw on and off with no issues. The watch is functional as found, running well and keeping accurate time. The movement is visually clean as found with no grime, pitting, oxidation. Winds and sets easily with no issues. There is one faint watchmaker's mark inside the case back: "2 23 59 NN". I have not had the watch cleaned or serviced in any way. I do not know the service history of the watch if any.
For optimum function I recommend having the watch professionally cleaned, lubricated and adjusted. The item "WWII HAMILTON Navigation POCKET WATCH 4992B US Army Air Force" is in sale since Monday, March 23, 2020. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Watches\Pocket Watches". The seller is "florida_water" and is located in Omaha, Nebraska. This item can be shipped to United States.