1974. You announce that you cannot fail performing a magic trick since you now have the Magician’s credit card which you show the audience and read the guarantee on the back. You do a few card tricks without a hitch but then perform a card trick where you are supposed to find a chosen card in the deck. Failing to do so a couple of times you pull out the credit card and the selected card is now SEALED inside the back of the credit card. Near mint contents and instructions in original excellent condition envelope.