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The Encyclopedia of Horology

Wristwatch · Manual-winding wristwatch

Omega Jumbo 2505 manual winding wristwatch

Partially verified

This Omega Jumbo, identified as model 2505, is a manual winding wristwatch dated to 1954. The stainless steel case measures 38.5mm in diameter excluding the crown, with an overall length of 47mm including the lugs. The round dial is finished with a gold Arabic numeral at 12 o'clock, complemented by baton and dot markers for the remaining hours, and features gold Losange hands. A sub-second register is positioned at 6 o'clock. The internal movement is the manual winding Caliber Omega 266, which is stated to operate at 18,000 bph with a 45-hour power reserve. The movement is numbered 14153013. The case back is inscribed with "Acier Inoxydable – Omega Watch Co. – Fab Suisse" and the reference number 2505-30. The watch is currently fitted with a brown Omega strap and a stainless steel Omega buckle.

Front view of the Omega Jumbo 2505 displaying the dial layout and sub-second register.
Front view of the Omega Jumbo 2505 displaying the dial layout and sub-second register. — laurent-fine-watches.myshopify.com. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
laurent-fine-watches.myshopify.com
Category
Wristwatch · Manual-winding wristwatch
Maker / attribution
Omega
Reference
2505
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
1954
Source-reported place
Switzerland
Source-reported serial
14153013

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

Case and Dial

The watch is housed in a stainless steel case measuring 38.5mm in diameter without the crown and 47mm in length across the lugs. The crown is original to the piece, bearing the Omega logo.

The dial is circular and finished with a gold Arabic numeral at the 12 o'clock position. The other hour markers consist of a mix of batons and dots. The time is indicated by gold Losange-style hands, while a sub-second register sits at 6 o'clock. The interior of the case back is marked with the reference 2505-30 and the inscription "Acier Inoxydable – Omega Watch Co. – Fab Suisse".

Evidence for this section
  • “38.50MM”
  • “The watch has a crown with the Omega logo.”
  • “The back case is in stainless steel with inside engraved “Acier Inoxydable – Omega Watch Co. – Fab Suisse” 2505-30 and a star.”

Movement and Function

Power is provided by a manual winding movement, specifically the Omega Caliber 266. The movement is specified as having 17 jewels, an oscillation rate of 18,000 bph, and a power reserve of 45 hours. The movement is individually numbered 14153013.

The watch includes a sub-second indicator located at the 6 o'clock position on the dial. The auction description reports that the watch is in good working condition.

Evidence for this section
  • “It is a manual winding movement with sub second with Caliber Omega 266.”
  • “The movement is numbered 14153013.”
  • “Come with 17 jewels, 18,000 bph and 45 hours of reserve power.”

Provenance and Identification

The object is identified by the model number 2505 and the manufacturing year of 1954. The watch is accompanied by a brown Omega-branded band and a corresponding stainless steel Omega buckle. No original box or papers are included with the object.

The auction description reports the object's condition as very good. The provided serial number for the movement is 14153013, which relates to the production of the Omega 266 caliber range.

Evidence for this section
  • “Beautiful Omega jumbo 38.5mm dial in stainless steel from 1954”
  • “The watch come with a brown Omega band with a stainless steel Omega buckle.”
  • “The movement is numbered 14153013.”

Open research questions

  • What is the specific production date range for movement serial 14153013 within the 1939-1963 window?
  • Are the gold-toned markers and hands original to this specific case reference?

Source evidence

Recorded claims and source quotations for Omega Jumbo 2505 manual winding wristwatch
FieldSource-reported valueSource quotation
Model2505“JUMBO - 2505”
CaliberOmega 266“Caliber Omega 266”
Case diameter38.50mm“38.50MM”
Movement serial14153013“The movement is numbered 14153013.”
Case materialStainless steel“STAINLESS STEEL”
Case back inscriptionAcier Inoxydable – Omega Watch Co. – Fab Suisse – 2505-30“inside engraved “Acier Inoxydable – Omega Watch Co. – Fab Suisse” 2505-30”

Visible details

  • Gold-toned Arabic numeral at 12 o'clock position
  • Sub-seconds sub-dial located at 6 o'clock
  • Crown featuring the Omega logo
  • Patterned brown leather strap with Omega-branded buckle

Research qualifications

  • Condition of the dial finish is unverified
  • Accuracy and longevity of the manual movement are not independently confirmed

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

Consulted source

ساعت مچی Omega Jumbo مدل 2505 ساخت 1954

Reviewed 2026-11-02 · Record f948331829

Terms in this record

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

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