A World War II Hamilton watch Co. Pocket watch in 'Aircraft watch Box', open black face, named 22 jewel movement, diameter 5.1 cm. The back cover engraved 'An 570 Mfr's part no. 33106 ....Hamilton watch Co.', the fitted mahogany case with front plaque detailed 'Aircraft Navigational watch box Bu. Aero U.S. Navy..'