Omega · Family: Seamaster 300
The Omega Seamaster 300 Co-Axial Master Chronometer (ref. 234.30.41.21.01.001) is a 41mm stainless steel dive watch, with a black dial, a black anodized aluminum bezel carrying a diving scale, and a design inherited from the original 1957 Seamaster 300. It runs the in-house Caliber 8912, Master Chronometer-certified (METAS), with ~60 hours of power reserve and magnetic resistance up to 15,000 gauss. Cazador has no verified price observations yet for this reference. Its differential: it belongs to the Seamaster's 'Heritage' line, distinct from the Diver 300M line already in the catalog, with a dial and index design closer to the 1960s Seamaster.
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The original Seamaster 300 debuted in 1957, the same year Omega also launched the Speedmaster and the Railmaster, forming the trio of tool watches known as the brand's 'Professional' family. Unlike the Diver 300M line — launched in 1993 and today the Seamaster's most visible face, including its James Bond association — the Seamaster 300 'Heritage' line directly revives the visual language of the 1950s and 60s model: open Arabic numerals, lozenge-shaped indexes, and an aged-finish aluminum bezel.
This reference, 234.30.41.21.01.001, comes in stainless steel with a 41mm case and a black dial, reproducing that vintage aesthetic with contemporary materials and finishing. The unidirectional bezel, in black anodized aluminum, carries the 60-minute diving scale filled with a vintage-toned Super-LumiNova that evokes the look of a period-correct watch.
Beneath the dial sits the in-house Caliber 8912, carrying Co-Axial Master Chronometer certification granted by METAS, the Swiss federal metrology institute, which requires passing precision, power-reserve, and magnetic-resistance tests above 15,000 gauss — far beyond the standard for most mechanical watches. The caliber delivers roughly 60 hours of power reserve thanks to its twin-barrel architecture.
With 300 meters of water resistance, a transparent sapphire case back revealing the movement, and a steel bracelet with a folding buckle, this reference pairs the Seamaster's original dive-watch pedigree with a retro aesthetic that clearly sets it apart from Omega's more modern Diver 300M executions.
This is the third Seamaster family Cazador adds, alongside the Diver 300M and Seamaster Planet Ocean already in the catalog, extending coverage to the Heritage 300 line.
Cazador has no verified price observations for this reference (n=0 as of today). We do not publish estimates without our own sourced market data.
The Seamaster 300 revives the original 1957 model's design (open numerals, aged aluminum bezel), while the Diver 300M, launched in 1993, has a different aesthetic and is the line most associated with James Bond.
It's a certification granted by METAS, the Swiss federal metrology institute, which tests the complete watch (not just the movement) for precision and resistance to magnetic fields up to 15,000 gauss.
Roughly 60 hours, thanks to a twin-barrel system.
Yes. It has 300 meters of water resistance and a unidirectional bezel with a diving scale, the professional dive standard Omega maintains across the Seamaster family.
It's a deliberate aesthetic choice that reproduces the look of Omega's 1950s and 60s dive watches, consistent with this line's 'Heritage' positioning.
In 1957, the same year Omega also introduced the Speedmaster and the Railmaster, forming the trio of tool watches known as the brand's 'Professional' family.