34.5 mm OMEGA SEAMASTER CAL 351 ca. 1950. The case has been lightly polished. Good running and just serviced caliber 351 Omega bumper wind automatic movement with 17J. Serial number 12xxxxxx dates the watch to 1950. The case is all stainless steel and signed on the inside and with the case ref number 2577-4. The case is screw back. The silver dial has raised arrow markers and sword hands. Original signed Omega crystal. Signed Omega crown. Signed Omega s/s buckle mounted to new dark brown leather strap.