Vintage Casio SL-750 Solar Cell Film Card w/ Case Made in Japan | eBay
Casio SL-800 Film Card registered as Essential Historical Material for Science and Technology by Japan's National Museum of Nature and Science - Fareastgizmos
Vintage CASIO SL-750 Film Card Solar Powered Calculator Credit - Etsy
Casio Computer Co. Ltd.. Film Card Solar Calculator (model SL-800). 1982 | MoMA