Well, your viewer being 60 years old and not a "new" reproduction, if the newer reproduction cost almost fifty bucks, yours must be worth more as an antique.
Bring it to antique car shows, (cruise nights), especially Chevy ones, and see what you can get for offers. Then bring it to antique dealers and compare prices. I wouldn't sell it right now, in case you have something pretty rare there, especially being an original. Do a search on Google, now that you know what it is. Good luck, and I hope you make a million. :)
Hubert