Locked Box Mystery

A clever effect in which any word is written on a slip of paper and locked inside a wooden box. This box is then placed inside a larger wooden box, and even so, the magician instantly knows the word written down by the spectator. Can also be used to divine the names of cards, or determine which object was locked inside the smaller box by a spectator from a group of several small items. Clever method and relatively simple to operate. Includes original instructions. The first example we have seen. Very good condition.