This watch is a 1960s CK14900 Constellation Piepan Chronometer Calibre 551, the case has been polished in the past though not too heavily. The dial has had some bubbling in the clear coat and patina, also the crown is a non-Omega replacement. I've tried to capture the dial condition in the photos as much as possible particularly around the dial text so you can see it clearly though from a distance and on the wrist it looks a lot better. The watch has had a movement service the last two months by my usual watchmaker and is running well. Looking for $850 US