Founded in La Chaux-de-Fonds in 1848, Omega has earned its place among the most storied names in Swiss watchmaking — as official timekeeper of the Olympic Games, as the watch worn on the Moon during Apollo 11, and as the brand that has pushed the boundaries of movement precision for over 175 years. The Seamaster 300 traces its roots to 1957, when Omega developed it as a professional diving instrument. The current re-interpretation, introduced in 2014, stays faithful to the proportions and character of that original while incorporating some of the most advanced movement technology available in modern watchmaking.

Reference 234.30.41.21.01.001 is a 41 mm stainless steel automatic diver's watch, just under 14 mm in thickness, with a polished and brushed case and tapered lugs. The black sandwich dial carries recessed hour markers and open Arabic numerals filled with vintage-toned Super-LumiNova, with rhodium-plated hands in the same lume treatment — a construction that gives the dial exceptional depth and contrast underwater. At its heart beats the Omega Co-Axial Master Chronometer Calibre 8912, running at 25,200 vph with 38 jewels, twin barrels and a 60-hour power reserve. The movement is METAS-certified, resistant to magnetic fields in excess of 15,000 gauss, and visible through a sapphire exhibition caseback. The domed scratch-resistant sapphire crystal sits above. The unidirectional rotating bezel carries a black oxalic anodized aluminium insert with a diving scale filled in vintage Super-LumiNova. Water resistance is rated to 300 metres. The watch is fitted on a stainless steel bracelet with a push-button deployant clasp with sliding extension.

This Omega Seamaster 300 Co-Axial Master Chronometer is in near mint condition and comes as a full set.