I posted this last year: I was browsing the Rhine Research Center website and I noticed again that they have ESP Cards for sale. “The set includes a box of 25 cards, a manual written by Dr. Louisa E. Rhine and a packet of standard ESP record sheets. Cost is $25.00/set includes shipping & handling. International orders please contact us first.
“Zener cards is the original name given to the ESP cards, named after the perceptual psychologist Karl Zener, a colleague of JB Rhine’s who suggested the five symbols to be used on the cards.”
Here is a picture from the Rhine Research Center archives of Gaither Pratt with ESP cards. I don’t know who the woman is, but if someone can identify her I will update this post.