4x10.25". Unopened clear plastic package with cardboard header reading "Special Series - Batman Trading Cards" on both sides. From set of 38 cards in the "Riddler" Back series of Batman issued by Topps in 1966. Last Batman gum cards using photos. Fronts are color photo with white borders and red photo mounts. "Riddler's Riddle" cards have text riddle and illustrated riddle on reverse, illustrated riddle only deciphered by using decoder provided. Front cards show Burt Ward as Dick Grayson and 2 other matching cards show him on rope ladder as Robin in 1966 "Batman" movie. Card backs are #10 and #25. We make no guarantee as to what cards are in this pack. Pack header is unpunched and N. Mint. Cards have some splits to cellophane but remain sealed as issued and N. Mint-Mint with no gum. From the Craig Warren Collection.