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The Encyclopedia of Horology

Wristwatch · Manual-winding wristwatch

Omega Caliber 30T2SC Wristwatch in Dennison Case

Partially verified

This vintage Omega wristwatch combines a Swiss-made Omega caliber 30T2SC manual-winding movement with an English-made Dennison case. The movement serial number 9950204 dates to circa 1943–1944, while the snap-on caseback bears an exterior presentation engraving dated June 24, 1952. The 33mm round case features tapered lugs, a stepped smooth bezel, and an acrylic crystal. Its cream-tone dial presents black Arabic numerals, blued steel hands, an orange central sweep seconds hand, and an outer minute track. The inside caseback is marked Dennison, Made in England, Denisteel Back, 13322, and 1475. It is mounted on a black leather strap.

Front view of the 33mm Omega manual-winding wristwatch showing cream dial, Arabic numerals, and orange seconds hand
Front view of the 33mm Omega manual-winding wristwatch showing cream dial, Arabic numerals, and orange seconds hand — Second Hand Horology. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
secondhandhorology.com
Category
Wristwatch · Manual-winding wristwatch
Maker / attribution
Omega
Reference
13322
Catalogue / lot identifier
WA-7369
Source-reported date
circa 1952
Country
Switzerland
Source-reported serial
9950204

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

Movement and Historical Context

The watch is powered by an Omega caliber 30T2SC mechanical movement with 16 jewels. The movement serial number 9950204 is dated by the source to approximately 1943–1944.

The watch is housed in an English-made Dennison case with a presentation engraving on the caseback dated 1952. The source attributes this combination to the practice of importing Swiss movements into the UK for housing in locally manufactured cases for the British civilian market.

Evidence for this section
  • “This Swiss-made timepiece is powered by the Omega caliber 30T2SC mechanical movement with 16 jewels and central sweep seconds.”
  • “Movement serial number 9950204 dates the Swiss-made Omega movement to approximately 1943–1944”
  • “During this period, Omega movements were imported into the UK and fitted into locally manufactured cases, including those made by Dennison.”

Case and External Construction

The timepiece features a 33mm round case manufactured by Dennison Watch Case Co. It includes a fixed, stepped smooth bezel, tapered lugs, and an acrylic crystal. The caseback is a snap-on type.

Internal case markings include 'DENNISON', 'MADE IN ENGLAND', 'DENISTEEL BACK', '13322', and '1475'. There is visible evidence of wear on the case exterior.

Evidence for this section
  • “The 33mm round case features a stepped smooth bezel, tapered lugs, and a snap-on Dennisteel stainless steel back.”
  • “Inside Case Back Markings: DENNISON, MADE IN ENGLAND, DENISTEEL BACK, 13322, 1475”
  • “Good vintage pre-owned condition with visible signs of age and wear consistent with previous use.”

Dial and Aesthetic Features

The dial is cream-toned and displays black Arabic numerals and an outer minute track. It is equipped with blued steel hour and minute hands, along with a central sweep seconds hand described as orange.

The watch is fitted with a black leather strap.

Evidence for this section
  • “The cream-tone dial features bold black Arabic numerals, blued steel hands, a contrasting orange central sweep seconds hand, and a full outer minute track.”
  • “Fitted with a black leather strap”

Open research questions

  • What is the significance of the secondary marking '1475' found inside the Dennison case back?
  • Can the production of Dennison cases with 'DENNISTEEL' markings be chronologically mapped to the 1940s-1950s period?
  • To what extent did the importation of Swiss movements into UK-made cases impact the original manufacturer's warranty status for Omega during this era?

Source evidence

Recorded claims and source quotations for Omega Caliber 30T2SC Wristwatch in Dennison Case
FieldSource-reported valueSource quotation
CaliberOmega 30T2SC“This Swiss-made timepiece is powered by the Omega caliber 30T2SC mechanical movement”
Movement Serial Number9950204“Movement serial number 9950204 dates the Swiss-made Omega movement to approximately 1943–1944”
Case ManufacturerDennison Watch Case Co. - England“Case Manufacturer: Dennison Watch Case Co. - England”
Case MarkingsDENNISON, MADE IN ENGLAND, DENISTEEL BACK, 13322, 1475“Inside Case Back Markings: DENNISON, MADE IN ENGLAND, DENISTEEL BACK, 13322, 1475”
Case Back EngravingB. J. TRETHEWY FROM DEVONPORT MANOR OFFICE STAFF 24-6-1952“Case Back Engraving: B. J. TRETHEWY FROM DEVONPORT MANOR OFFICE STAFF 24-6-1952”
Jewel Count16 jewels“Omega caliber 30T2SC mechanical movement with 16 jewels”
Case Diameter33mm“The 33mm round case features a stepped smooth bezel”
Frequency18,000 vibrations per hour“It operates at 18,000 vibrations per hour”

Visible details

  • Light cream or pale dial displaying black Arabic numeral hour markers and an outer minute track.
  • Dark blued hour and minute hands paired with a contrasting orange sweep seconds hand.
  • Prominent pitting and surface wear on the finish of the upper lugs and case edges.
  • Fitted with an unstitched smooth black leather strap and stainless steel pin buckle.

Research qualifications

  • The internal movement and the inscribed caseback are described in the listing text but not pictured in the provided images.
  • Listing notes movement dating to circa 1943–1944 while the case presentation dates to 1952, reflecting later casing or retail presentation.

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

Consulted source

1952 Omega Mechanical Watch 33mm 16 Jewels 30T2SC Swiss Made Wristwatc – SECOND HAND HOROLOGY

Reviewed 2026-10-22 · Record 321b77fd75

Terms in this record

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

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