A bold evolution of Omega’s most iconic dive watch, the Seamaster Diver 300M Titanium, Tantalum & Sedna™ Gold redefines luxury under pressure. Its 42 mm case merges lightweight grade 5 titanium with a tantalum base bezel ring, a rare and visually distinctive metal celebrated for its cool grey-blue tone and exceptional hardness. Accents of polished 18K Sedna™ gold highlight the bezel edge, crown, and helium escape valve, creating a sophisticated contrast that balances sport and refinement.

The black ceramic dial, laser-engraved with Omega’s signature wave motif, evokes the depths of the ocean with a subtle sheen. Applied Sedna™ gold indexes and hands filled with white Super-LumiNova ensure legibility in any light, while the date window at 6 o’clock provides functional symmetry. Through the sapphire crystal caseback, the Co-Axial Master Chronometer Calibre 8806 is revealed—an automatic movement resistant to magnetic fields up to 15,000 gauss, offering a 55-hour power reserve and precision certified by METAS.

Paired with a titanium and tantalum bracelet featuring Sedna™ gold center links and a folding clasp, this Seamaster exemplifies Omega’s mastery of material innovation and design balance.

Key Features:

Brand: Omega
Model: Seamaster Diver 300M Co-Axial Master Chronometer
Reference Number: 210.90.42.20.01.001
Movement: Automatic, Omega Calibre 8806, Master Chronometer Certified, 55-hour power reserve, anti-magnetic to 15,000 gauss
Case Material: Grade 5 Titanium with tantalum base bezel and 18K Sedna™ gold accents
Case Size: 42 mm

Bezel: Blue ceramic with Ceragold™ diving scale
Dial: Black ceramic with laser-engraved wave motif, date at 6 o’clock
Crystal: Domed sapphire crystal with anti-reflective coating
Bracelet: Titanium and tantalum bracelet with Sedna™ gold links and folding clasp
Water Resistance: 300 m / 1000 ft (30 bar)
Includes: Original box and papers
Condition: Pre-owned, very good

A fusion of strength, rarity, and precision, the Seamaster Diver 300M Titanium, Tantalum & Sedna™ Gold is both a professional-grade dive instrument and a statement of contemporary luxury. Its tri-metal construction and advanced Master Chronometer movement embody Omega’s legacy of craftsmanship and innovation beneath the surface.