A spectator's signed coin is placed under a handkerchief held by the same spectator. The magician then removes a brass container from his pocket and places it in the spectator's other hand.  The Handkerchief is whipped away - the coin has vanished.  The spectator now opens the box, inside is another box - this box is also opened to reveal another and finally another - four boxes in total, all fully closed, all inside each other.  

When the last last box is opened by the spectator, they're amazed to find the signed borrowed coin inside.  

Beautifully made props that are easy to perform.