Omega had a line of 30mm watches which were produced at the time by Omega workshops in Geneva. About 1953 the name Geneve appeared on the dial, referring to the Genevan Observatory where the 30mm calibers set high records. In time the collection broadened and in 1979 the line stopped.
But we have one and not just anyone, 14k yellow gold case with green vignette dial. Real seventies, different and colorful. A dress watch with an unusual green dial with baton markers, clean as a whistle. Not for everyone but the new owner will fall in love with it putting it on the wrist. so be warned..;)