I'll clear this up, it's from a one owner 1977 New Yorker, however it would be close to time correct for any 70s mopar. The size is a 78-15, the same size that came on the car when it rolled out of the factory. Obviously it's going to be for looks but I believe you could air it up with the inflator and run it 1000 miles just like it was 1977. And for the naysayers that have never see one in this type of car doesn't mean it's not a factory option, it's means you haven't been lucky enough to find one. Think about it, once they got used one time most probably got threw in the junk pile....