Only Online Auction

Geneva, Dec 08, 2022

LOT 121

Hamilton Watch Co.
Military pocket watch, 24-hour indication, centre-seconds, calibre grade 4992 B; “G. C. T.”; chromium-plated metal

CHF 300 - 600

EUR 350 - 650 / USD 350 - 650 / HKD 2,500 - 5,000

Sold: CHF 437

Chromium-plated metal, open-face, keyless-winding, round-shaped, military pocket watch, black colour dial with 24-hour indication, centre-seconds and “G. C. T.” mention.

Bezel and case-back screwed.

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Image Image

Grading System
Grade: A


Case: 3


Movement: 3*


Overhaul recommended, at buyer's expense

Dial: 3-01


HANDS Original

Brand Hamilton, Lancaster, Pennsylvania (U.S.A.)

Year circa 1941

Movement No. 4 C 11 012

Case No. 007 499 (by Keystone Watch Case Co., Philadelphia, and Riverside, New Jersey, U.S.A.)

Material chromium-plated metal

Diameter 51.8 mm.

Caliber size 16s, grade 4992 B, model 5, adjusted temperature and 6 positions, 22 jewels

Weight 110.5 gr. (approx.)

Signature movement


The movement used in this watch was produced at 144 995 examples.


“G. C. T.” (Greenwich Civil Time)

Called the “Master Navigational Watch”, these pocket watches were used by the Navigator on Bomber aircraft like the B-17, B-24, and B-29. Each dial was marked with “G. C. T.”, known at the time as “Greenwich Civil Time” because that was the standard European time-zone.