DOUBLE NUMBER BOX.

DOUBLE NUMBER BOX. A spectator places four numbered blocks in any order he chooses into a wood box. He locks the box and keeps the key. For additional protection he takes the box and places it inside another box and then locks it. Despite these precautions the magician is able to tell the sequence of the numbers on the blocks. This elegant example was produced by carl willmann. 2 1/4x7x3 inches (5.5x17.5x7.5 cm). Germany: Willmann, circa 1920.