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The Encyclopedia of Horology

Wristwatch · Diver's wristwatch

Omega Seamaster 300 Master Co-Axial Wristwatch

Partially verified

This Omega Seamaster 300 diver's wristwatch features a 41 mm stainless steel case fitted with a unidirectional rotating ceramic bezel and a screw-down crown. The black sandblasted dial features recessed triangular luminous hour markers, Arabic numerals at 3, 6, 9, and 12, and broad-arrow style hands coated with vintage-toned Super-LumiNova. According to the auction catalogue, the watch is powered by the automatic Master Co-Axial calibre 8400, rated resistant to magnetic fields exceeding 15,000 Gauss. It is mounted on a brown leather strap secured with contrasting stitching.

Front view of the Omega Seamaster 300 wristwatch on a brown leather strap
Front view of the Omega Seamaster 300 wristwatch on a brown leather strap — Auktionen Dr. Crott. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.invaluable.com
Category
Wristwatch · Diver's wristwatch
Maker / attribution
Omega
Reference
233.32.41.21.01.002
Catalogue / lot identifier
470
Source-reported date
circa 2015
Country
Switzerland
Source-reported serial
87271409

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 Exterior

The timepiece is housed in a 41 mm stainless steel case featuring a screw-down crown and a unidirectional rotating bezel. The bezel is constructed with a ceramic insert incorporating a Liquidmetal™ diving scale.

The exterior design includes a glazed screw-down caseback, which is reported to provide water resistance up to 300 meters (1000 feet).

Evidence for this section
  • “Dimensions 41 mm”
  • “Case: Steel, glazed screw back, unidirectional rotating bezel, screwed crown.”
  • “The ceramic bezel features a Liquidmetal™ diving scale.”
  • “water-resistant to 300m/1000ft”

Dial and Hands

The black dial is finished with a sandblasted texture. It features recessed triangular luminous hour markers and Arabic numerals at the 3, 6, 9, and 12 o’clock positions. The dial is paired with rhodium-plated broad-arrow style hands.

The hands and indices are finished with vintage-toned Super-LumiNova, described as 'retro' in the source report.

Evidence for this section
  • “The dial of the Seamaster 300 is sandblasted and black”
  • “luminous indexes, luminous hands”
  • “rhodium-plated hands coated with “retro” Super-LumiNova”

Mechanism and Performance

The watch is powered by the automatic Omega Master Co-Axial calibre 8400. This movement is noted for its anti-magnetic properties, with a resistance rating exceeding 15,000 Gauss.

The movement is described by the source as being visible through the transparent caseback. Condition report notes that the movement is capable of running, though they recommend a cleaning.

Evidence for this section
  • “antimagnetic Omega Master Co-Axial calibre 8400”
  • “anti-magnetic >15,000 Gauss”
  • “The antimagnetic Omega Master Co-Axial calibre 8400 is visible through the transparent caseback.”
  • “Movm.: very good, capable of running, cleaning recommended.”

Source-Reported Information

The auction source dates the production of this timepiece to circa 2015. Included documentation consists of a guarantee card and original clasp.

The condition is described by the source as 'almost mint' for the overall piece, with the case and dial separately noted as 'very good,' though the case exhibits signs of light wear.

Evidence for this section
  • “circa 2015”
  • “Guarantee card, original clasp”
  • “A charismatic Seamaster Co-Axial Chronometer in almost mint condition”
  • “Case: very good, slightly worn.”
  • “Dial: very good.”

Open research questions

  • Does the current movement serial number align with the production year of 2015?
  • Has the recommended cleaning been documented in the item's service history?
  • Does the provided leather strap match the original factory specifications for reference 233.32.41.21.01.002?

Source evidence

Recorded claims and source quotations for Omega Seamaster 300 Master Co-Axial Wristwatch
FieldSource-reported valueSource quotation
Reference233.32.41.21.01.002“Ref. 233.32.41.21.01.002”
Movement Number87271409“Movm. No. 87271409”
Calibre8400“Cal. 8400”
Case Diameter41 mm“Dimensions 41 mm”
Water Resistance300m/1000ft“water-resistant to 300m/1000ft”
BezelCeramic with Liquidmetal diving scale“The ceramic bezel features a Liquidmetal™ diving scale.”
Movement Serial87271409“Movm. No. 87271409”

Visible details

  • Black dial with vintage-toned triangular luminous markers and Arabic numerals at 3, 6, 9, and 12
  • Fitted with a brown leather strap with off-white contrast edge stitching
  • Broad-arrow styled hands and a knurled crown at 3 o'clock
  • Black rotating bezel marked with a diving scale

Research qualifications

  • The glazed screw back and calibre 8400 movement are catalogued by the source but not visible in the provided primary photograph.
  • Condition description 'almost mint condition' is source-reported and not independently verified.

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

Consulted source

At Auction: Omega - Seamaster 300

Reviewed 2026-10-25 · Record 269baef1d7

Terms in this record

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

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