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The Encyclopedia of Horology

Wristwatch · Military diver's wristwatch

Omega Seamaster 300 “Military”, Ref. ST 165.024

Partially verified

This Omega Seamaster 300 “Military” reference ST 165.024 is a stainless steel military diver's wristwatch dated by the auction house to 1967. The source documents that the watch features a 40 mm stainless steel case fitted with fixed bars and a screw-down crown, powered by the automatic calibre 552 with 24 jewels. The black dial presents luminous hour markers, an encircled 'T' symbol below the brand signature, Arabic numerals at 12, 3, 6, and 9, sword-shaped hour and minute hands, and center sweep seconds. According to the cataloguing, the case back is engraved with British military markings including the W10 army service code and issue year 1967.

Front view of the Omega Seamaster 300 Military ref. ST 165.024 on a NATO strap
Front view of the Omega Seamaster 300 Military ref. ST 165.024 on a NATO strap — Phillips. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.phillips.com
Category
Wristwatch · Military diver's wristwatch
Maker / attribution
Omega
Reference
ST 165.024
Catalogue / lot identifier
123
Source-reported date
1967
Country
Switzerland
Source-reported serial
24'719'912

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

Construction and Specifications

The Omega Seamaster 300, reference ST 165.024, features a 40mm stainless steel case. The case includes curved, beveled lugs and fixed spring bars.

The timepiece is fitted with a screw-down crown and is mounted on a NATO-style fabric strap.

Evidence for this section
  • “Dimensions 40mm Diameter”
  • “cases, with distinctive curved and beveled lugs, were delivered with fixed spring bars.”
  • “The crown was screw down as opposed to the snap down design as found on production versions.”

Dial and Movement

The watch utilizes an automatic calibre 552 movement with 24 jewels. The dial includes Arabic numerals at 12, 3, 6, and 9, alongside luminous hour markers.

The display features broad sword-shaped hour and minute hands and a center sweep seconds hand. The dial is marked with an encircled 'T' symbol.

Evidence for this section
  • “Calibre Automatic, cal. 552, 24 jewels”
  • “Dials featured an encircled “T” designation, signifying the use of tritium for the luminous hour markers and hands.”
  • “The broad, sword-shaped hour and minute hands, as well as the angular sweep seconds hand, were also specially designed.”

Military Markings and Provenance

The case back is engraved with military markings including the 'W10' service code, the broad arrow insignia, NATO codes, and the year 1967.

An Omega Extract from the Archives confirms the movement number 24'719'912 was produced on April 3, 1967, and delivered to the British Army.

Evidence for this section
  • “Case No W10/6645 – 99 – 923 – 7697 – A/030/67”
  • ““W10” signifies that the watch was issued to the British Royal Army”
  • “confirming its date of production on April 3, 1967 and delivery to the British Army”

Open research questions

  • Are the markings on the case back consistent with the expected physical wear for an item issued in 1967?
  • Does the current condition of the luminous material correspond to the 1967 production period?

Source evidence

Recorded claims and source quotations for Omega Seamaster 300 “Military”, Ref. ST 165.024
FieldSource-reported valueSource quotation
Movement CalibreAutomatic, cal. 552, 24 jewels“Calibre Automatic, cal. 552, 24 jewels”
Case Number / Military MarkingsW10/6645 – 99 – 923 – 7697 – A/030/67“Case No W10/6645 – 99 – 923 – 7697 – A/030/67”
Case Diameter40mm“Dimensions 40mm Diameter”
Movement Number24'719'912“Movement No 24'719'912”
Archive DeliveryApril 3, 1967 to the British Army“confirming its date of production on April 3, 1967 and delivery to the British Army”

Visible details

  • Black dial with an encircled 'T' logo below the Omega signature and luminous hour markers
  • Calibrated rotating bezel with Arabic numerals at 10-minute intervals and a triangular marker at 12
  • Mounted on a woven fabric NATO strap with metal keepers
  • Broad sword-shaped luminous hour and minute hands with center seconds
  • Stainless steel case with curved, beveled lugs and a textured crown

Research qualifications

  • Movement and case back military engravings are catalogued by the source but not visible in the primary frontal photograph

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

Consulted source

Omega The Geneva Watch Auction: XIII

Reviewed 2026-10-22 · Record b8f45f1d3a

Terms in this record

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

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