Omega
Seamaster Planet Ocean 600M Co-Axial Master Chronometer
215.30.44.21.03.001
Deep-diving credentials meet Master Chronometer precision in 43.5 mm steel.
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Overview
The Omega Seamaster Planet Ocean 600M Co-Axial Master Chronometer reference 215.30.44.21.03.001 is a 43.5 mm stainless steel diver rated to 600 metres of water resistance, presented on a striking blue dial. Introduced in 2016, it is powered by Calibre 8900, Omega's in-house Co-Axial movement certified to the stringent Master Chronometer standard by the Swiss Federal Institute of Metrology (METAS). It sits at the technical apex of the Planet Ocean line, combining professional dive capability with a high level of movement finishing and anti-magnetic resistance.
History
The Planet Ocean collection was launched in the mid-2000s as a modern, larger-cased evolution of the Seamaster diver concept, drawing on Omega's long association with professional and scientific diving. Reference 215.30.44.21.03.001 belongs to the generation introduced in 2016, when Omega transitioned the Planet Ocean range to the Master Chronometer certification framework and the new 8900-series movements. This generation represented a meaningful step forward in both movement technology and dial execution, and the line has remained in continuous production since its introduction. Among collectors, the blue-dial 43.5 mm variant is regarded as the definitive expression of the modern Planet Ocean.
Notable points
- Calibre 8900 is a Co-Axial escapement movement certified as a Master Chronometer, meeting METAS standards for accuracy, magnetic resistance up to 15,000 gauss, and power reserve.
- The 600-metre water-resistance rating places the watch firmly in professional diver territory, well beyond the requirements of recreational diving.
- The blue dial features applied indices and a unidirectional rotating bezel with a ceramic insert, combining legibility with corrosion resistance.
- Master Chronometer certification requires the movement to pass eight tests conducted by METAS, a more comprehensive regime than traditional COSC chronometer testing.
- The 43.5 mm stainless steel case uses a helium escape valve, underscoring the watch's saturation-diving heritage.
Specifications
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