Hamilton Watch Co. American WWII period two-day Model 21 mar...

Hamilton Watch Co. American WWII period two-day Model 21 marine chronometer, no. 2E11142, the 4" silvered dial signed Hamilton Lancaster, PA., U.S.A., with black Arabic numerals, outer minute track, subsidiary seconds and a forty-eight hour 'UP/DOWN' power reserve indicator, Model 21 14 jewel nickel finish chain fusee movement with Harrison's maintaining power, Earnshaw type spring detent escapement, compensated balance and helical hairspring, in a gilt-brass gimbal mount and a three-tier square glazed mahogany brass bound case with side carry-handles, bearing a maker's plaque to front, 7.5" ** the case bearing an instruction plaque to the inner top cover; also a 'Negus Nautical Instruments, New York label

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