At 45.5mm, this replica seamaster planet ocean 215924 45.5mm brings the ceramic-cased Planet Ocean formula to its largest expression. Reference 215.92.46.22.01.006, this version uses a ceramic case and bezel combination that distinguishes it from the steel-cased variants in the 600M range. Omega developed the ceramic Planet Ocean to offer a lighter alternative that also resists scratches and corrosion more effectively than steel. The oversized case diameter and 600-meter water resistance rating position it firmly in the professional dive tool segment.

Key Specifications

• Case diameter: 45.5mm
• Case material: ceramic
• Bezel: ceramic, unidirectional rotating with liquidmetal scale
• Crystal: domed sapphire with anti-reflective treatment
• Water resistance: 600 meters
• Movement: automatic co-axial GMT
• Functions: GMT second time zone, date, helium escape valve

The liquidmetal diving scale on the bezel provides sharp, legible markings that resist wear better than traditional engraved and filled numerals.

Design & Finishing

Ceramic as a case material transforms the wearing experience of a 45.5mm dive watch. The lower density compared to steel shaves noticeable weight, which offsets the large diameter during extended wear. The matte ceramic surface picks up fewer fingerprints than polished steel, keeping the watch looking clean throughout the day. The GMT hand allows independent tracking of a second time zone, a complication that adds travel utility without cluttering the dial. For an entirely different expression within the same collection, see the Planet Ocean 600M orange dial, which uses a bright chronograph layout instead of the GMT configuration. Both sit within the Seamaster range and share the 45.5mm case footprint.

On the Wrist

The 45.5mm ceramic Planet Ocean is not a subtle watch. It commands attention through sheer scale, but the ceramic construction prevents it from feeling burdensome. The rotating bezel clicks with precision, and the helium escape valve at 10 o’clock serves as a visual reminder of the 600-meter depth capability. Whether used for actual diving or daily wear, this replica seamaster planet ocean 215924 45.5mm provides a ceramic alternative to the standard steel Planet Ocean platform.