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The Encyclopedia of Horology

Pocket watch · 24-hour military pocket watch

Hamilton Military Issue Base Metal Case Pocket Watch

Partially verified

This open-face military pocket watch by Hamilton features a base metal case and a black 24-hour dial with white Arabic numerals. Catalogued under lot 83447 by Omnia Auctions, the timepiece contains a source-reported 22-jewel Grade 4992B Model 5 movement bearing serial number 4C77948. The case is catalogued with number 889593, a diameter of 51.60 mm, and a total weight of 109 grams. The dial displays an outer 60-unit scale along with a 1 to 24-hour track and is inscribed with G.C.T.

Dial and front view of the Hamilton 24-hour pocket watch in a base metal open-face case
Dial and front view of the Hamilton 24-hour pocket watch in a base metal open-face case — Omnia Auctions. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.invaluable.com
Category
Pocket watch · 24-hour military pocket watch
Maker / attribution
Hamilton
Reference
Not recorded
Catalogue / lot identifier
83447
Source-reported date
Not established
Country
Not established
Source-reported serial
4C77948

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Dial Configuration and Visual Presentation

The pocket watch features an open-face black dial formatted with a 24-hour display. The layout comprises an inner ring of Arabic numerals from 1 through 24, framed by an outer scale marked in five-unit increments for minutes and seconds. Centered beneath the hand arbor, the dial is marked with 'G.C.T.'

Indications are provided by three white-finished hands: an hour hand with a spade tip, an elongated minute hand, and a center seconds hand.

Evidence for this section
  • “Black dial with an inner 24-hour numeral ring and outer minute/second numerals in 5-unit steps”
  • “Dial text marked 'G.C.T.' located under the center arbor area”
  • “White finished spade-tipped hour hand, long minute hand, and center seconds hand”

Case Form and Catalogued Dimensions

The watch is housed in an open-face base metal case catalogued with case number 889593. Omnia Auctions recorded the piece with a size of 51.60 mm and an overall weight of 109 grams. The top features a fluted crown positioned within a bow that has flared, contoured shoulders.

The auctioneer's condition report notes 'Light wear to case.' No photographs of the case back or its interior are provided in the source documentation.

Evidence for this section
  • “Case #: 889593”
  • “Size: 51.60mm”
  • “Weight: 109g”
  • “Top bow with flared contoured shoulders surrounding a fluted crown”
  • “Light wear to case.”

Reported Movement and Operating Status

The auction catalogue lists the movement as a 22-jewel Grade 4992B, Model 5, with movement/serial number 4C77948. In the listing's condition report, its running state is described simply as 'Functioning.'

Because the listing does not include imagery of the internal mechanism, the movement grade, jewel count, and mechanical condition remain unverified seller-reported claims.

Evidence for this section
  • “Grade: 4992B”
  • “22 jewels”
  • “Model: 5”
  • “Movement/Serial #: 4C77948”
  • “Functioning.”

Open research questions

  • Does the exterior of case 889593 bear standard military specification markings (such as AN5740 or Master Navigation Watch engravings)?
  • Does direct physical inspection of movement 4C77948 verify the reported Grade 4992B and 22-jewel count?
  • Is the case constructed with screw-on bezels and case back, and are there internal watchmaker service marks recorded inside the case?

Source evidence

Recorded claims and source quotations for Hamilton Military Issue Base Metal Case Pocket Watch
FieldSource-reported valueSource quotation
Movement Grade4992B“Grade: 4992B”
Jewel Count22 jewels“22 jewels”
Movement Serial Number4C77948“Movement/Serial #: 4C77948”
Case Number889593“Case #: 889593”
Size51.60mm“Size: 51.60mm”
Weight109g“Weight: 109g”
ModelModel 5“Model: 5”
Reported FunctionalityFunctioning“Functioning.”
Reported Case ConditionLight wear to case“Light wear to case.”

Visible details

  • Black dial with an inner 24-hour numeral ring and outer minute/second numerals in 5-unit steps
  • White finished spade-tipped hour hand, long minute hand, and center seconds hand
  • Dial text marked 'G.C.T.' located under the center arbor area
  • Top bow with flared contoured shoulders surrounding a fluted crown

Research qualifications

  • Movement and interior case back are not pictured in the listing
  • Functionality is source-reported without independent verification

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Sold at Auction: HAMILTON MILITARY ISSUE BASE METAL CASE POCKET WATCH

Reviewed 2026-10-21 · Record 68b5872cb8

Terms in this record

Glossary explanations for terms named in this object’s record.