I have bought recently a very nice bolted variation called Money Prison, for sale a magicshop.nl
http://www.magicshop.nl/Webwinkel-Produ ... rison.html
money prison.jpg
A bill sits between two transparent plates en is fastened with a padlock.
There is an opening at the left of one of the plates. Spectator puts its signature on it.
Magician signs another bill. A hanky is put over the plates and when removed, the bills have switched places.
Your bill sits now between the plates, and you have now the signed bill by the spectator in your hands.
Great effect, easy to do. And totally examinable afterwards.
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