RARE early Omega Seamaster Chronometer ref. 2577/2520 SC in 18K solid gold screw back case. This watch dates to early 1950s and is powered by a bumper automatic chronometer movement cal. 352. No record of service but the watch is running well. The original dial has some patina and signs of aging spread evenly around to exhibit a nice vintage look. The case measures 34mm in diameter by 42.5mm long.