Funny tag on fender- what is it?

Boy , that's a weird one Joe . If it was on top of the fender tag in one of the screw holes it may be a shipping tag to be removed by the dealer. Otherwise it may be as you thought and be an inspection tag . Talk about weird , I pulled a "66 Coronet 500 out of a back yard that had a /6 in it . checking the VIN confirmed the engine . Car was way too far gone . Took the VIN and the fender tag and sent it to Govier . Truly "one of none"

Yes, crazy for sure. I've disassembled over 50 old MoPars over my years... most during the time when they had no value like they do now.
Anyhow in all those years I do not remember seeing anything like that on them or any cars I've seen in the wrecking yards. I removed it years ago along with the fender tag after reading about how people at car shows take them. Never had it happen to me but I'll air on the side of caution.