Found this today at a flea market for $10, keeps time and is in pretty good shape. Not the origanal strap or crystal, but for ten bucks I'm OK with it. My best guess is that it is from the early 70's. I also think it has been serviced, but it was nasty and took a few hours to get the scunge off. After 8 hours it has gained about 10 seconds. I think I can live with that.