Lot of 12. 2 7/8” X 4 3/8” cards showing various characters from show in negative black & white print. Point of card was to stare at center for thirty seconds and then look at another section to see reverse optical illusion. 1953. Included in this lot from a set of 24 are, #1, 6, 9, 13-14, 17-18, 20-24. Images include: “Commander Buzz Corey, Tonga in space helmet, cosmic ray gun, flying saucer, speeding jet car, Special Agent Jack Narz, Buzz in Space Patrol cap, Planetoid Prospector, Space Pirate Captain, Veteran Spaceliner Pilot, Buzz Corey’s Special Insignia and Carol. Card #13 has some moderate handling wear and remaining cards have light handling wear with some age spots scattered throughout. #13 is VG with remainder FN/VF.