Omega
Seamaster Diver 300M Chronograph Master Chronometer
210.30.44.51.01.001
Dive-ready chronograph precision, certified to the highest standard.
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Overview
The Omega Seamaster Diver 300M Chronograph Master Chronometer (ref. 210.30.44.51.01.001) pairs the heritage dive credentials of the Seamaster line with the rigorous performance certification of the Master Chronometer standard. Its 44 mm stainless steel case houses Calibre 9900, a co-axial escapement movement that has passed the stringent eight-test protocol of the Swiss Federal Institute of Metrology (METAS). The black ceramic dial, finished with Omega's signature wave pattern, anchors the instrument firmly in the Seamaster's nautical tradition.
History
Omega introduced the Diver 300M Chronograph in its Master Chronometer guise in 2018, marking a significant step in the brand's ongoing programme to bring METAS certification to its core sport references. The Seamaster Diver 300M line itself traces its roots to the 1990s and has long been one of Omega's most recognised and commercially important collections. The addition of a chronograph complication to the Master Chronometer platform demonstrated the movement family's versatility, and the reference has remained in production since its debut.
Notable points
- Calibre 9900 is a bi-compax co-axial chronograph movement certified as a Master Chronometer, guaranteeing accuracy of 0 to +5 seconds per day and resistance to magnetic fields of at least 15,000 gauss.
- The dial is crafted from black ceramic and features the wave-relief pattern that has been a defining visual element of the Seamaster Diver 300M since the 1990s.
- The 44 mm stainless steel case is rated to 300 metres of water resistance, maintaining full dive-watch utility alongside the chronograph complication.
- METAS certification requires each movement to pass eight distinct tests covering precision, magnetic resistance, and power-reserve performance — a standard more demanding than COSC chronometer certification alone.
- The reference sits within a broader 2018 refresh of the Diver 300M collection, which introduced ceramic dials and updated case architecture across the line.
Specifications
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