First off, you got a riser bar stem made for upright handlebars on a bike with drop bars. The tires look shot to hell. It's probably a very early 80's vintage with 27" wheels. I've never heard of Zeus or Crown. So, I can't comment on pedigree. But, it looks like a well made item. It's also a good size bike for average/large size riders. Suntour bits and Sugino crank are nice. I would try to determine if the frame is lightweight cro mo or something better than average. Somebody out there might want to buy it. Don't expect to get too much for it in it's current condition.