1956 Parkhurst Photo Magic Gum
Country of origin: Canada
Size: TBD
Each 5¢ pack of Parkhurst Photo Magic Gum from Toronto, Canada came with one of these self-developing photo cards, similar to the 1948 Topps Magic Photo set. The complete set (which seems to be 60 cards) along with $2.50 could be redeemed for a Roy Rogers camera. There are several wrestler cards along with some aviation cards and other mixed sports, with only one basketball card in the set.
Additional resources: PSA Population Report