Omega Seamaster 300M Blue 210.30.42.20.03.001

The Omega Seamaster Diver 300M Blue Ref. 210.30.42.20.03.001 is the modern evolution of one of Omega’s most iconic dive watches, combining contemporary engineering with the recognizable design language that has defined the Seamaster since the 1990s. Introduced as part of the 2018 redesign of the Diver 300M collection, this model features a 42 mm stainless steel case, a blue ceramic dial with laser-engraved wave pattern, and a matching blue ceramic unidirectional bezel with a white enamel diving scale. The dial includes luminous skeleton hands, applied hour markers, and a date window at 6 o’clock, all protected by a domed sapphire crystal with anti-reflective coating. A helium escape valve at 10 o’clock reinforces its professional diving capability while maintaining the distinctive Seamaster look.

Inside the watch is Omega’s Co-Axial Master Chronometer Calibre 8800, an in-house automatic movement certified by METAS for exceptional precision and resistance to magnetic fields up to 15,000 gauss. The movement provides a ~55-hour power reserve and can be viewed through the sapphire exhibition caseback, showcasing the Geneva wave finishing in arabesque. Built for serious underwater performance, the watch offers 300 m (1,000 ft) water resistance and is paired with a stainless steel bracelet featuring Omega’s diver extension system for comfort over a wetsuit.

Reference: 210.30.42.20.03.001

Bracelet: Stainless Steel Bracelet

Case: 42mm - Stainless Steel

Lug Width: 20mm

Movement: Omega 8800 - Automatic

Functions: Hours, minutes, seconds, Date

Box and Papers: Inner/outer boxes, COSC card, Picto card - no warranty card

Crystal: Sapphire

Bracelet size: 7.5”

Case has little to no wear. Bracelet has minimal wear with one mark on the clasp. Dial, hands, and crystal have no wear. Watch runs within spec.