Omega Seamaster 300m, 41mm, Calibre 2500 Co-Axial Automatic Chronometer, 212.30.41.20.01.003

The OMEGA Seamaster Diver 300M 212.30.41.20.01.003 represents an important generation of OMEGA’s professional dive watch, combining the classic 41mm Seamaster proportions with a more contemporary ceramic bezel and the brand’s Co-Axial movement technology.

Its 41mm stainless steel case is paired with a black dial, luminous skeletonised hands and applied hour markers, while the black ceramic unidirectional diving bezel gives this generation a cleaner and more modern appearance than its aluminium-bezel predecessors. The familiar helium escape valve at 10 o’clock and stainless steel bracelet preserve the distinctive architecture of the Seamaster Diver 300M.

Inside is the OMEGA Calibre 2500, a self-winding, chronometer-certified movement incorporating OMEGA’s Co-Axial escapement and providing approximately 48 hours of power reserve. The Calibre 2500 occupies an important position in OMEGA’s modern history as one of the movements that established Co-Axial technology across the brand’s mainstream collections.

Specifications

• Brand: OMEGA
• Collection: Seamaster Diver 300M
• Reference: 212.30.41.20.01.003
• Movement: OMEGA Calibre 2500 Co-Axial Automatic Chronometer
• Power Reserve: Approximately 48 Hours
• Case Material: Stainless Steel
• Case Size: 41mm
• Dial: Black
• Bezel: Black Ceramic Unidirectional Diving Bezel
• Crystal: Domed Sapphire Crystal with Anti-Reflective Treatment
• Bracelet: Stainless Steel Bracelet with Diver Extension
• Water Resistance: 300m
• Functions: Hours, Minutes, Seconds, Date
• Additional Features: Helium Escape Valve, Screw-In Crown
• Accessories: Box and Papers
• Condition: Traces of usage, scratches can be seen but generally in good condition
• Availability: Global Concierge Sourcing Service

Key Features

• Classic 41mm Seamaster Proportions — This generation retains the established 41mm dimensions of the earlier Diver 300M while introducing more contemporary materials and detailing.
• OMEGA Calibre 2500 — Co-Axial automatic chronometer movement with approximately 48 hours of power reserve, representing an important stage in OMEGA’s adoption of Co-Axial technology.
• Black Ceramic Diving Bezel — The ceramic bezel provides a more modern interpretation of the traditional Seamaster Diver 300M design while maintaining its functional unidirectional operation.
• Professional Diving Capability — Rated to 300 metres and equipped with a screw-in crown, helium escape valve and diving bezel, the Seamaster retains the functional architecture expected of the Diver 300M.
• Box and Papers — Supplied with its box and papers, adding further appeal for enthusiasts seeking a well-presented example of this generation.

The OMEGA Seamaster Diver 300M 212.30.41.20.01.003 sits at an appealing point in the Seamaster lineage, retaining the compact 41mm proportions and familiar styling of earlier models while introducing a ceramic bezel and Co-Axial movement. For enthusiasts who prefer the pre-42mm generation of the Diver 300M, it offers an attractive balance of traditional Seamaster character and modern OMEGA engineering.

Style is Timeless.