Omega SeaMaster 300 no date ref 165024At the end of the 1940s, the first Omega Seamaster debuted, blending the elegance of a dress watch with the rugged durability required by military timepieces from WWII. Its innovative O ring gasket provided superior water resistance, setting the stage for a long lineage of dependable sport watches. As recreational diving gained popularity, Omega began developing more specialized underwater tools. In 1957, the Seamaster 300 was introduced as Omegas