Omega Seamaster Aqua Terra 150M 234.30.41.21.03.002

This is the Seamaster 300 in Summer Blue, part of Omega's 75th Anniversary Seamaster capsule. The Seamaster 300 line dates to 1957, when Omega introduced it as a professional diver's watch. This reference revives the original design cues in a modern Master Chronometer package.

The case is 41mm polished and brushed stainless steel with a blue ceramic rotating bezel. The varnished Summer Blue dial has a gradient finish, with rhodium-plated hands, recessed hour markers and open numerals filled with light blue Super-LumiNova. A sapphire crystal sits over the dial, and the case is water resistant to 300 meters. The solid caseback carries a stamped commemorative Seamaster logo showing Poseidon and two seahorses. Inside is the Omega Co-Axial Master Chronometer calibre 8912, METAS certified, resistant to magnetic fields up to 15,000 gauss, with a 60 hour power reserve. It sits on a matching stainless steel bracelet with a fold-over clasp.

This is a 2025 example in excellent pre-owned condition. The bracelet fits up to just under 7.25 inches. It comes with the original box and papers.