This vintage Omega Seamaster 120 “Deep Blue” Ref. 166.073 is a rare and highly collectible diver’s watch from the late 1960s. Housed in a robust 42mm stainless steel case, it features a domed plexiglass crystal and a distinctive bidirectional Bakelite bezel with audible clicks, adding both function and vintage charm. Its standout feature is the exceptionally rare “Deep Blue” dial, known for its rich tone, luminous markers, and striking legibility. Powered by the reliable automatic Caliber 565, this Seamaster was designed for underwater performance with everyday elegance. A true gem for collectors, it blends tool-watch heritage with unique aesthetic appeal—an iconic reference that showcases Omega’s legacy in professional diving watches.