I agree with Mr. Monkeyarms on 1973 as a date of manufacture. There should be some serial numbers stamped on the left hand side of the headtube that will give you a better idea. You can use the Murray serial number project information posted here. Collectible beauty is in the eyes of the beholder, as I think this bike is awesome. I just picked up a Kmart All-Pro labled '72 Murray made "lightweight" 3 speed at the bike show in Hurst, Tx. I'm currently overhauling and detailing it, and I'll post pictures when it is done. I used a good quality chrome cleaner on my bars and stayed away from anything abrasive. This isn't Schwinn chrome and the "flash" plating is easily scratched. Congrats on your cool find!