Omega Seamaster Cosmic 136.017 winding watch

Omega Seamaster Cosmic winding watch with a steel case and a beautiful two-tone dial. The crown and crystal are original. The dial has minor patination, and the case shows signs of age, use, and wear. The leather strap is used. Service history is unknown, but the watch functions well. The quick-set date works by repeatedly pulling the crown to its outermost position, and the watch has a deviation of approximately 20 seconds per day.