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The Encyclopedia of Horology

Wristwatch · Chronograph

Omega Ref. 2915-1 Speedmaster "Broad Arrow" Chronograph Wristwatch

Partially verified

This reference 2915-1 is a manual-winding stainless steel chronograph wristwatch manufactured by Omega in 1957. Identified as an early Speedmaster "Broad Arrow" model, the piece features an external stainless steel bezel engraved with a tachymeter scale, along with pump chronograph pushers and a winding crown. The auction catalog notes that it is powered by the 17-jewel caliber 321 manual movement. The dial displays an aged chocolate brown tropical tone with three subsidiary dials, an oval Omega symbol, luminous hour markers, and signature broad arrow hands, paired with a leather strap.

Front view of the Omega Ref. 2915-1 Speedmaster showing the brown dial, broad arrow hands, steel tachymeter bezel, and case on a black strap.
Front view of the Omega Ref. 2915-1 Speedmaster showing the brown dial, broad arrow hands, steel tachymeter bezel, and case on a black strap. — Phillips. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.phillips.com
Category
Wristwatch · Chronograph
Maker / attribution
Omega
Reference
2915-1
Catalogue / lot identifier
53
Source-reported date
1957
Source-reported place
Switzerland
Source-reported serial
15'500'006

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

Identity and Reference

This timepiece is identified as an Omega Speedmaster 'Broad Arrow', reference 2915-1. The movement number is 15'500'006.

The watch is manufactured in stainless steel with a 38mm diameter. Omega records confirm the production of this specific watch on November 22, 1957.

Evidence for this section
  • “Reference No 2915-1”
  • “Movement No 15'500'006”
  • “Dimensions 38mm Diameter”
  • “confirming production of the present watch on November 22, 1957”

Dial and Visual Features

The dial displays a uniform 'tropical' tone described as a vibrant milk-chocolate shade. It features three subsidiary registers and an oval Omega logo.

The watch is equipped with 'Broad Arrow' hands and luminous material on the dial and hands that has aged to a golden tone. The bezel is stainless steel with an engraved tachymeter scale.

Evidence for this section
  • “The present watch displays an exceptional "tropical" dial that has aged to a vibrant milk-chocolate shade.”
  • “The brown tone is not only rich and vivid, but it is also incredibly even throughout.”
  • “luminous material on both the dial and hands have aged to an attractive golden tone.”
  • “The large, “Broad Arrow” minute and hour hands are one such trait”

Mechanical Specification

The watch is powered by the manual-winding caliber 321 movement with 17 jewels.

External features include two round chronograph pushers flanking a signed winding crown. A leather strap with a stainless steel Omega pin buckle is included.

Evidence for this section
  • “Calibre Manual, cal. 321, 17 jewels”
  • “Fitted with a textured black strap and two round chronograph pushers flanking the signed winding crown.”
  • “Stainless steel Omega pin buckle”

Open research questions

  • Verification of current strap condition or authenticity relative to the auction lot description.
  • Condition of the case back engraving, which is described in the essay but not visible in current imagery.

Source evidence

Recorded claims and source quotations for Omega Ref. 2915-1 Speedmaster "Broad Arrow" Chronograph Wristwatch
FieldSource-reported valueSource quotation
Reference2915-1“Reference No 2915-1”
Movement Number15'500'006“Movement No 15'500'006”
CalibreManual, cal. 321, 17 jewels“Calibre Manual, cal. 321, 17 jewels”
Case MaterialStainless steel“Material Stainless steel”
Diameter38mm“Dimensions 38mm Diameter”
Production DateNovember 22, 1957“confirming production of the present watch on November 22, 1957”

Visible details

  • Uniform rich brown 'tropical' dial surface with three recessed subsidiary registers.
  • Steel bezel showing an engraved tachymeter scale reading 'TACHYMÈTRE BASE 1000'.
  • Broad Arrow hour hand and straight minute hand filled with aged luminous compound.
  • Fitted with a textured black strap and two round chronograph pushers flanking the signed winding crown.

Research qualifications

  • Movement and case back are not visible in the photograph.
  • Accompanied archive extract and literature are mentioned in the text but not shown.

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

Consulted source

Omega The Geneva Watch Auction: XIV

Reviewed 2026-10-22 · Record e3ab7a57e1

Terms in this record

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

Other chronograph records