2024 Omega Seamaster Diver 300 M Complete Original Box & Papers

The Diver 300M is best known as a time-and-date diver, but this reference takes the collection's most iconic colorway into chronograph territory — and that's exactly what separates it. Where most Seamaster Diver 300M models run the time-only Master Chronometer calibre, this 44mm piece is powered by the higher-complication Calibre 9900, a column-wheel chronograph with an independently adjustable hour hand for travel. The blue ceramic dial with its laser-engraved waves is matched by a blue ceramic bezel and, distinctively, blue ceramic chronograph pushers — a fully integrated ceramic treatment you won't see on the steel-and-rubber or two-tone variants. Presented on the stainless steel bracelet, it reads as the sportiest, most capable expression of the blue Seamaster: the same ocean-bred 300m diving pedigree, but with stopwatch function and a bolder, more technical case. For a buyer deciding within the Diver 300M family, this is the one that pairs the signature blue look with genuine chronograph mechanics.
Key details — mechanical features

• Omega Calibre 9900 self-winding chronograph movement
• Column-wheel chronograph with Co-Axial escapement
• Master Chronometer certified (METAS) and chronometer certified
• Resistant to magnetic fields up to 15,000 gauss (1.5 tesla)
• Silicon balance spring with two barrels mounted in series
• Time-zone function (independently adjustable hour hand)
• 60-hour power reserve
• Beats at 28,800 vibrations per hour (4 Hz)
• 54 jewels
• 44mm stainless steel case
• Water resistant to 300 meters / 30 bar
• Helium escape valve
• Chronograph functions: central chronograph seconds, 12-hour and 60-minute recorders, plus small seconds
• Date window at the 6 o'clock position
• Domed scratch-resistant sapphire crystal
• Wave-edged sapphire crystal exhibition caseback
• Screw-in crown