Computer Vision by Zimmerman Collectors' Workshop The spectators are each given

The spectators are each given a small coin envelope and instructed to seal their key in it

showing they are compatible

This is from early Haenchen stock found in the Viking Vault

Card Table Platform

Computer Vision by Zimmerman Collectors' Workshop The spectators are each givenA great unusual mental effect. Now hard to find. Very cool little item from Dick Zimmerman, who although famous for his ring and hoop themed stage act, was an inventor of many clever close up items. Computer Vision is one of these, released in 1979. It has not been produced for a couple of decades. The effect is simple: a square of thin cardboard is shown. It depicts the screen and buttons of a "computer" well, at least a computer from 1979 when we