Based on that photo.... It is a gold tone omega. Can you get better photos? Ideally in macro mode (usually a flower button) to allow close ups of the dial.
This is a 9K yellow gold case ladies watch with integrated bracelet. If I am not mistaken it is British version case. Unfortunately Omega Vintage Database does not provide detail on British version.
This is information from an auction site: http://www.watchauctions.co.uk/index.php/A-9k-white-gold-lady-s-Omega-bracelet-watch.-58775-5 http://www.fellows.co.uk/1203-lot-8...&paperfilter=&threesixty=&vhigh=130000&vlow=0 OMEGA - a 9k white gold manual wind lady's bracelet watch, the silvered dial with hourly applied markers with black inserts, octagonal shaped case, numbered 711 5593, fitted to an integral bracelet with clasp, signed seventeen jewel calibre 625. Case width 23mm. Total weight 33gms. I believe it is late 60s or early 70s model.