If you're new to CB and wondering why anybody would care about old radios of 20+ years, it's because there are still tens of thousands of these CB radios being actively used, modified for 10-Meter Ham...
So you are selling an old radio, or you just bought one, and you want to know what year it was made? Well, there are some clues that you can use to determine the decade it is from, and then you can use that...