Description: Omega Seamaster Diver 300M Pre-owned Omega Seamaster Diver 300M ref 210.60.42.20.99.001 (2024) takes the familiar Seamaster formula and pushes it into more experimental territory. The Diver 300M has been around since 1993, known for its wave dial, helium escape valve, and everyday dive-ready build. This version keeps those core elements, but mixes in materials you don’t see all that often. The 42mm case is made from grade 2 titanium, which keeps it lightweight