What are these cards????
I picked these up at a local card show today because I’ve never seen them before, and I’m sure there are plenty of Canseco/Griffey/Sandberg supercollectors out there that don’t have them. They are some kind of metal, have nothing on the back, and don’t appear to be numbered. Any clue???!!! They look to me like early 90s based on the picture…sorry for the poor photos, they came from my camera phone!