I am sure that you are all aware of these.But I believe they are 1959 released by Parkhurst in a view master type thing.
The cards are double sided so since I have a few sets of these I was able to scan the front and back at the same time.
So the top card represents the front of the card and the bottom scan represents the back of that same card.
They are a bit larger than the normal Parkhurst cards at the time. They measure about 4 inches X 3 inches. I do
not know much if anything at all about Indy racing. But I do find these to be a neat item. The 6 cards are the total of
Indy cards in this game.So 6 different cards and 12 great pictures.Thanks.