Twenty-four 2.75x4.5" magic pictures, each showing various characters from classic 1950s TV show in negative bw print. Point of card was to stare at center for 30 seconds, then look at another section to see reverse optical image. Card numbers 10 and 13 have moderate age toning, remainder have faintest trace of aging and corner tip wear, Exc. overall. This is the complete set, the only set we have ever offered. Cards in this condition book for $100 each.