Omega
Seamaster Planet Ocean Co-Axial
2200.50.00
A large-cased diver that brought Co-Axial precision to the deep.
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Overview
The Omega Seamaster Planet Ocean ref. 2200.50.00 is a 45.5 mm stainless steel diver produced between 2005 and 2011. It houses Calibre 2500, one of Omega's early Co-Axial escapement movements, paired with a bold black dial. The reference sits within the Planet Ocean line, itself a flagship of the long-running Seamaster collection.
History
The Planet Ocean line was introduced in the mid-2000s as Omega's answer to serious sport-diving watches, offering larger case diameters and robust construction compared to earlier Seamaster references. The 2200.50.00 was among the first generation of Planet Ocean models and helped establish the line's identity as a tool-watch with manufacture-level finishing. Calibre 2500 represented an important milestone for Omega, being one of the first movements to incorporate the Co-Axial escapement developed by George Daniels and licensed by Omega, promising reduced friction and longer service intervals. The reference ran through 2011, by which point Omega had begun transitioning the Planet Ocean range to newer Co-Axial calibres.
Notable points
- 45.5 mm stainless steel case — an assertive size that defined the first-generation Planet Ocean aesthetic.
- Calibre 2500 Co-Axial escapement reduces sliding friction between escapement components, theoretically extending service intervals.
- Black dial with luminous indices and a unidirectional rotating bezel meet ISO dive-watch standards.
- Produced from 2005 to 2011, the reference spans the formative years of the Planet Ocean line.
- An early example of Omega integrating the Co-Axial escapement into a sport-diver context.
Specifications
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