I thought I would throw this up for someone to identify, just for curiosity sake. All I know is.. it was in the trunk of a rusted out 56 Plymouth Savoy. I dont think it came from that car, but not sure, cannot find another anywhere on the web. It has a nbr on the back PT - 2533048, It is made of pot metal, it is not magnetic. It has six bosses drilled for looks like 3/16 in screws on the back, figure it must be part of a full hubcap. Maybe someone has a need for it or at least has seen another one like it.. Could be it's not even part of a hubcap, I don't know.