Remove the watch from your pocket. The watch is attached to a chain. Open the case and display the watch. Ask a spectator to set the time and close the case. Unlink the watch from the chain and put the empty chain back into your pocket. Bring out a beautiful wooden drawer box. Let the spectator put the watch into the box and close the drawer. When you open the box, the watch has disappeared. The drawer is empty. Slowly, remove the chain from your pocket. Linked to the chain is the watch. Let the spectator open the case to verify the time he has set. It is correct.