Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.30.42.20.01.010 – Black Dial

Omega Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.30.42.20.01.010 – Black Dial

Since 1993 the Seamaster Diver 300M has been Omega's signature dive watch, and this reference pares it back to its purest form. The 42mm stainless steel case carries a unidirectional bezel with a black anodized aluminium insert and a white-lumed dive scale, framing a matte black aluminium dial laser-engraved with the Diver's signature wave pattern. Skeletonized rhodium hands and indexes filled with white Super-LumiNova keep it legible in any light, and the helium escape valve and screw-down crown are there for genuine professional use. Turn it over and the sapphire caseback shows the Calibre 8806, a Co-Axial movement certified Master Chronometer by METAS and resistant to magnetic fields above 15,000 gauss. It's finished on a brushed steel mesh bracelet with a foldover clasp.

This example dates from 2025 and is in excellent pre-owned condition. It comes with its Omega warranty card dated 12/23/2025, so the balance of Omega's five-year factory warranty remains in force through December 2030.

Includes box & papers

Case: 42mm stainless steel, 13.8mm thick, 49.7mm lug-to-lug, 20mm lug width; unidirectional rotating bezel with black anodized aluminium insert; helium escape valve; screw-in crown; domed sapphire crystal with anti-reflective treatment; sapphire display caseback
Dial: Black aluminium with laser-engraved wave pattern; rhodium-plated skeleton hands and indexes with white Super-LumiNova
Movement: Omega Calibre 8806, automatic, Co-Axial escapement, silicon balance spring, METAS-certified Master Chronometer, 25,200 vph (3.5 Hz)
Power Reserve: 55 hours
Water Resistance: 300m / 1,000ft
Bracelet: Brushed stainless steel mesh with foldover clasp