Omega
Seamaster Planet Ocean Co-Axial
2201.50.00
The dive watch that brought Co-Axial precision to serious depths.
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Overview
The Omega Seamaster Planet Ocean ref. 2201.50.00 is a 42 mm stainless steel diver produced between 2005 and 2011, powered by the in-house Calibre 2500 with Co-Axial escapement. Its bold black dial and robust case established the Planet Ocean as a credible tool watch in the Seamaster lineage, bridging professional diving heritage with Omega's then-new escapement technology.
History
The Planet Ocean sub-line was introduced in the mid-2000s as a more purpose-built diver within the broader Seamaster family, drawing on Omega's long association with underwater exploration. The Calibre 2500, one of the first movements to carry the Co-Axial escapement in a production diver, represented a significant engineering milestone for the brand. Reference 2201.50.00 remained in production for roughly six years, during which it became a benchmark for the early Planet Ocean generation and attracted strong collector interest as the line evolved toward later calibres.
Notable points
- Calibre 2500 Co-Axial escapement reduces friction and extends service intervals compared to traditional lever escapements.
- 42 mm stainless steel case struck a balance between wearability and the robust proportions expected of a serious dive watch.
- Black dial with applied luminous indices and a unidirectional rotating bezel meet the functional demands of recreational and professional diving.
- Produced from 2005 to 2011, the reference spans the formative years of the Planet Ocean line and is now regarded as a first-generation collectible.
- The Co-Axial escapement in this reference was an early example of Omega integrating its proprietary technology across the Seamaster range.
Specifications
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