Omega positioned the 232.30.46.51.01.002 as a large-format chronograph within the Seamaster Planet Ocean sub-family, and this replica Seamaster 232304 delivers that oversized sport-watch experience in full. The reference name includes “600m” and “Co-Axial Chronometer,” both indicating that this is a tool watch designed for depth resistance and certified timing accuracy. At 45.5mm with a thick case profile, the 232.30.46.51.01.002 sits firmly in the category of watches built for presence on the wrist rather than disappearing under a shirt cuff.

Key Specifications

• Case diameter: 45.5mm
• Complication: chronograph (two sub-registers)
• Water resistance rating: 600 meters
• Bezel: unidirectional rotating with black ceramic insert
• Crystal: domed sapphire with anti-reflective coating
• Bracelet: stainless steel with diver extension clasp
• Caseback: solid screw-down construction

The Planet Ocean chronograph pushes the Seamaster platform to its maximum dimensions. The chronograph pushers sit at 2 and 4 o’clock, flanking the screw-down crown at 3 o’clock.

Design & Finishing

Chronograph Planet Oceans carry a dial layout that balances sub-dial readability with the overall sport-watch aesthetic. The two registers sit at 3 and 9 o’clock, with a running seconds hand on the main dial. The ceramic bezel insert features a liquid-metal diving scale that resists scratching and fading. At this case size, the bracelet links are proportionally wider than on standard Seamaster references, which keeps the visual weight balanced. Compare this against the smaller Planet Ocean 215.30.46.51.01.001 to see how different references handle the same 600m depth rating. Both live within the broader Seamaster catalog.

On the Wrist

A 45.5mm chronograph with 600m depth resistance is not a subtle watch. It announces itself on the wrist and wears best on arms 7.25 inches and above. The weight is substantial, and the case height means shirt cuffs will need clearance. Buyers who want the Planet Ocean DNA in a more restrained package should look at the non-chronograph references in the 42mm range. For those who want maximum tool-watch capability and do not mind commanding wrist space, this is the reference to consider. This replica Seamaster 232304 brings the full chronograph Planet Ocean specification to your wrist without compromise on presence or functionality.