Like RW mentioned; many moons ago Pennsylvania had an intelligent, (imagine that?), system where you got a pin on button along with your paper info license. The pin was easily attached to an outer garment and didn't flop around in a strong wind and drive you nuts. Unfortunately they went away.

I often times see button collections at shows and flea markets going for a decent amount although not really expensive. I have saved every license I ever bought and the booklet that came with it; probably worthless but like RW I hope someday to do something with them in a frame.

There are so many better ways to do licensing that would be less expensive in the long run and more practical from a renewal standpoint but other than internet sales we still plod along with this archaic system.