Omega · Family: Seamaster
The Omega Seamaster Diver 300M Co-Axial Master Chronometer Chronograph (ref. 210.30.44.51.01.001) adds a 44mm automatic chronograph to Omega's flagship dive line, with a black dial laser-engraved in a wave pattern. As of August 2026, Cazador has 0 verified price observations; the launch price was €7,400 on a steel bracelet. Its differential trait: Master Chronometer certification with resistance to magnetic fields up to 15,000 gauss, well beyond the industry's usual standard.
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The Seamaster Diver 300M debuted in 1993 as Omega's flagship dive watch, with the skeletonized sword hands and unidirectional bezel that defined the line's look. Over time the family expanded with a chronograph version, which in 2018 moved to the Master Chronometer generation with Caliber 9900.
The 44mm steel case, 17.2mm thick and 52.2mm lug-to-lug, is notably large, a direct consequence of housing the chronograph mechanism while keeping the 300-meter water resistance of a genuine dive instrument. The ceramic unidirectional bezel and the helium escape valve at 10 o'clock reinforce that professional purpose.
Caliber 9900 is an in-house movement with a Co-Axial escapement, column wheel, and vertical clutch, certified Master Chronometer by METAS — the independent Swiss body that puts the cased watch, not just the loose movement, through eight separate tests over ten days. Thanks to its silicon balance spring, it resists magnetic fields up to 15,000 gauss, well beyond what conventional chronometer certification requires.
The black dial, with a laser engraving that reproduces a wave pattern and skeletonized sword hands inherited from the original 1993 Seamaster 300M, is rounded out with a 60-hour power reserve and arabesque Geneva stripe finishing visible through the sapphire case back. The reference is offered on both a steel bracelet and a rubber strap, with launch prices of €7,400 and €6,800 respectively.
We don't have verified price observations for this reference. The launch price was €7,400 on a steel bracelet and €6,800 on rubber, though we don't publish a current market range without backed data.
It's Omega's most demanding certification: METAS puts the cased watch through eight tests over ten days, verifying accuracy, power reserve, and magnetic resistance up to 15,000 gauss, well beyond conventional COSC standards.
Yes, it's rated to 300 meters and has a helium escape valve, professional dive-watch features despite carrying the chronograph complication.
Caliber 9900, an Omega in-house movement with a Co-Axial escapement, column wheel, and vertical clutch, and a 60-hour power reserve.
They're a direct nod to the original 1993 Seamaster 300M, which introduced that skeletonized hand design characteristic of the line.
Besides the chronograph, this version has a notably larger case (44mm vs. the base model's usual 42mm) to house the added mechanism.
Yes, Omega offers this reference on both a steel bracelet and a rubber strap, at different launch prices for each option.