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Omega Seamaster Diver 300M Co-Axial Master Chronometer — 210.20.42.20.01.001

Omega

Seamaster Diver 300M Co-Axial Master Chronometer

210.20.42.20.01.001

Two-tone dive heritage, refined by Master Chronometer precision.

Estimated market value
$6,300
Confidence: High

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Overview

The Omega Seamaster Diver 300M Co-Axial Master Chronometer in reference 210.20.42.20.01.001 pairs a 42 mm stainless steel and yellow-gold two-tone case with a striking black ceramic dial rendered in Omega's signature wave pattern. Powering the watch is Calibre 8800, a movement certified to the stringent Master Chronometer standard by the Swiss Federal Institute of Metrology (METAS). The combination places the piece at the intersection of the Seamaster's long diving heritage and Omega's contemporary movement technology.

History

The Seamaster Diver 300M line traces its roots to 1993, when Omega relaunched the Diver 300M as a modern professional dive watch that would go on to achieve broad cultural recognition. The current generation, introduced in 2018, brought a comprehensive redesign encompassing ceramic dials, the Co-Axial Master Chronometer movement architecture, and improved water resistance. The two-tone steel-and-gold configuration continues a tradition of offering the Diver 300M in precious-metal and mixed-material variants, appealing to collectors who seek a dressier expression of the tool-watch form.

Notable points

  • Black ceramic dial: the wave-pattern surface is executed in ceramic, offering superior scratch resistance and long-term colour stability compared with traditional lacquered dials.
  • Calibre 8800: a Co-Axial escapement movement certified as a Master Chronometer, meeting METAS requirements for accuracy, magnetic resistance up to 15,000 gauss, and power-reserve performance.
  • Two-tone construction: the 42 mm case combines stainless steel with yellow-gold elements, bridging the Diver 300M's tool-watch origins with a more formal aesthetic.
  • 300-metre water resistance: the reference retains the full professional dive specification of the Diver 300M line, including a unidirectional rotating bezel.
  • 2018 generation redesign: the current Diver 300M introduced a slimmer profile, ceramic bezels, and the Master Chronometer movement standard across the collection.

Specifications

Brand
Omega
Collection
Seamaster
Reference
210.20.42.20.01.001
Years of production
2018 – present
Case
42mm Steel & gold two-tone
Case material
Stainless steel & 18k gold
Case diameter
42 mm
Movement
Cal. 8800
Crystal
Sapphire
Dial
Black ceramic wave-pattern
Bezel
Black ceramic dive bezel with gold accents
Bracelet / strap
Two-tone steel & gold bracelet
Water resistance
300 m
Power reserve
55 h
Complications
Date
Type
Diver
Worn as
Men's
Also known as
Two-tone SMP, シーマスター, 海马300米, 海马300

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