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The Encyclopedia of Horology

Wristwatch · Automatic wristwatch

Omega Chronometer Reference 2398

Partially verified

This Omega dress watch, dating to 1947, features a 34.5mm steel case with crab-claw lugs and a silver dial. The dial displays an applied Omega logo and a small seconds sub-dial. Internally, the watch is powered by the calibre 30.10 automatic bumper movement, which holds a chronometer rating. The watch is accompanied by an Omega archive extract confirming its production year and original delivery to Guatemala. It is presented on a steel coffee-bean style bracelet. The watch has been checked and regulated by the vendor's watchmaker.

Omega Chronometer Reference 2398 on the wrist.
Omega Chronometer Reference 2398 on the wrist. — Bulang & Sons. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.bulangandsons.com
Category
Wristwatch · Automatic wristwatch
Maker / attribution
Omega
Reference
2398
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
1947
Source-reported place
Not established
Source-reported serial
106xxxxx

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 34.5mm diameter steel case, characterised by its distinctive crab-claw lugs. The watch is presented on a steel bracelet featuring a coffee-bean link construction. The silver-toned dial is clear of luminous material and incorporates an applied Omega logo, with a small seconds sub-dial positioned in the lower half of the dial face.

The overall appearance of the watch is consistent with its production period in the late 1940s.

Evidence for this section
  • “The silver no-lume dial has an applied Omega logo and small seconds in the lower half of the dial.”
  • “fitted with a so-called ‘coffee-bean’ steel bracelet”

Movement and Functionality

The watch is powered by an automatic bumper movement identified as the Omega calibre 30.10. This specific movement is noted for its chronometer rating, a feature that distinguishes it from standard automatic movements of the time. The mechanism functions via the 'bumper' oscillating weight system rather than a full-rotor automatic mechanism.

The auction description reports that the movement has undergone a technical assessment. It has been checked and regulated by the vendor's watchmaker to ensure its mechanical performance.

Evidence for this section
  • “houses a seldom-seen automatic bumper movement that is chronometer rated.”
  • “Cal 30.10 automatic chronometer bumper movement”
  • “fully checked and regulated by our watchmaker.”

Provenance and Documentation

The watch is accompanied by an archive extract provided by Omega. This documentation confirms the original production date of the timepiece to 1947. Furthermore, the archive records specify the initial geographical destination for the watch upon its release from the manufacture, noting that it was delivered to Guatemala.

This documentation serves to verify the watch's origin and period. The combination of the archive records and the watch itself provides a complete reference for the item as it was originally dispatched from Omega.

Evidence for this section
  • “The watch comes with an Omega archive extract stating that the watch was produced in 1947 and delivered to Guatemala.”
  • “Comes with Omega archive extract”

Open research questions

  • What is the specific production volume of the reference 2398?
  • Is the coffee-bean bracelet original to the watch as delivered in 1947, or is it a period-correct addition?

Source evidence

Recorded claims and source quotations for Omega Chronometer Reference 2398
FieldSource-reported valueSource quotation
MakerOmega“Vendor: Omega”
Reference2398“Reference 2398”
Production Year1947“dates to 1947”
Case Size34.5mm“34.5mm steel case”
MovementCalibre 30.10“Cal 30.10 automatic chronometer bumper movement”
Movement Serial106xxxxx“Movement serial 106xxxxx”
ProvenanceGuatemala“delivered to Guatemala”
Bracelet StyleCoffee-bean“so-called ‘coffee-bean’ steel bracelet”

Visible details

  • The watch features distinctive 'crab-claw' style lugs attaching to the bracelet.
  • The dial is signed 'OMEGA AUTOMATIC CHRONOMETER'.
  • The crown appears to bear the Omega symbol.
  • The bracelet consists of small, rounded links frequently referred to as coffee-bean style.

Research qualifications

  • The serial number provided (106xxxxx) is partially obscured in the source data.
  • The specific metallurgical composition of the 'steel' is not further defined beyond its appearance.

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

Consulted source

ساعت مچی امگا Omega Chronometer رفرنس 2398

Reviewed 2026-11-02 · Record fc66e5fd80

Terms in this record

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

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