Hamilton Watch Company Model 21 Two-day Marine Chronometer, Lancaster, Pennsylvania, No. 7641, c. 1940, 4-in. Arabic numeral silvered dial inscribed Hamilton Lancaster PA., U.S.A., 7641 and 1941, full plate nickel damascened movement marked Hamilton Watch Company, Lancaster, Penn., Model 21 14 Jewels, chain fusee, maintaining power, steel balance, helical hairspring, balance lock screw and spring detent escapement, all in a weighted brass bowl and gimbal, walnut three-tiered brass-bound box with carrying handles, printed instructions under the lid and "Break Circuit" attachment in the base, overall dimensions, ht. 10 x wd. 8 1/4 x dp. 7 3/4 in.

Condition: Runs well, age consistent imperfections on the case, original lacquer on bowl and gimbal. Key and balance break lock key in the case.