The Omega Constellation Chronometer Quartz Bi-metal. It’s a lovely vintage genuine Omega. It’s in need of a good service, polish and needs a new battery. I believe it’s from the 1970’s. I purchased this watch from the Watches of Knightsbridge auction back in 2012. I’m selling a few watches from my vintage Omega collection. I’m sad to see this go. Once it’s purchased and shipped I won’t be accepting returns in order to avoid any funny business. I am happy to answer all your questions to take additional pictures if required.
eBay