Out in my garage - there is a old CD - Civil Defense card that you had to carry on your sunvisor that permitted you to operate a CB radio in your car.
I believe the law back then said you had to frame your license and that it had to hang on a wall near your CB radio or something.
My dad's call letters were KNP 2516 and my Uncles was KNP 1413
His was on there too.
The link that was posted for old call signs - it is funny, because when I went to tear down the shanty - which was where the CB shack was set up - under the Futon couch there was one box of S3 magazines and another box of QSL cards and one card that stuck out in my mind was from a guy up in Erie PA - KID 3145
It's pretty neat when you can physically put a card with a person - 45 years later. The post mark was probably 1965 - because my sister was born in 1966 and my dad's QSL cards did not have her name on it - just my mom and dad's and my two sisters and I.
Maybe I will have to dig around in the garage and find that box and scan a couple of hundred of them someday when I don't have anything to do.