NEST OF BOXES PEERLESS

A spectator is asked for the loan of a coin, which is duly marked by its owner. The coin is then vanished by the magician. Pior to this, the magician has displayed a small brass box, which was left in full view. Following the vanish, the small box is opened by the spectator and a round brass box is found. This is opened only to disclose another, even smaller box. Finally, the fourth--and hopefully last--box is opened. To the spectators surprise, his missing marked coin is found within!