1948 Topps Magic Photos
Country of origin: United States
Size: 7/8" x 1-1/2"
This unique set of 252 tiny cards contains images of athletes, dogs, inventors, and war heroes to name a few. All of the images were "self-developing" – similar to a Polaroid – issued with blank fronts that could be developed into photos by exposing the cards to sunlight.
Additional resources: Checklist