1928 Hamilton Grade 992 21j Montgomery RR PW

Updated September 15, 2026

An open-face railroad grade pocket watch in mint condition, featuring a size 16s nickel finish Grade 992 Model 2 movement manufactured by the Hamilton Watch Co. of Lancaster, Pennsylvania. The 21-jewel movement belongs to run number 162 of 175 with a run quantity of 20,000 units, showcases a prominent 2nd pattern bar damaskeening finish, and is configured with ruby and sapphire jewel material set in gold screw settings, a gold center wheel, a Reed regulator, a double roller, a going barrel, a Breguet hairspring, and factory adjustments to temperature, isochronism, and five positions with movement serial 2512810. The pristine white porcelain enamel double-sunk Montgomery dial features every minute numbered from 1 to 60 with red numerical five-minute markers, bold block Arabic hour numerals, blued steel spade hands, and a sunken sub-seconds register at the 6 o'clock position. The movement is safely housed inside a polished silver-tone base metal screw-back case stamped with a Crescent and Star Trade Mark emblem with case serial 173367. Diagnostic timegrapher testing registers a daily rate of +5 seconds per day, a beat error of 1.9 milliseconds, and an amplitude of 206 degrees at a parameter of 18000 beats per hour.This watch is running as of time of listing. Service is required for accurate timekeeping, and extended runtime without service is not guaranteed.

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