Not sure if you UK guys will have trouble finding a Kennedy HalfDollar to complete the trick since it doesnt come with one but here in America my Dad had to go to 3 banks to find a Kennedy Half dollar and all he found was a Bicentennial one, which doesnt match up with the non-Bicentennial Half Dollar in the trick (hopefully no one examines the coins close up or is familiar with the differences between the two)
Anyways I got this trick in the mail, took me about 10 performances to perfect it without spectators knowing the gimmick.
http://www.youtube.com/watch?v=2wQVpnTt ... re=related
Instead of leaving one of the two coins in the wallet, which requires you to control your angles more, I pull both coins out, put both in my hand, then pull out the chinese coin that looks like a Kennedy half dollar on one half out and place it on top of my hand. Some spectators saw I had screwed up my angles when trying to leave one coin in the wallet and could tell there was more than one kennedy half dollar looking coin.
Anyways I find that if you pull the card out of a deck of cards than the wallet that came with the trick, the spectator is much less likely to suspect the card of being a gimmick.
Be careful working with metal surfaces, magnet on coin wont attatch to card if its surrounded by metal. I find putting a peice of paper between the coin and the metal surface helped fix it, but spectators might seem suspicious to the magnet if the trick wasnt working because of metal.
Be careful setting the card down on metal, I did that once and it made a *bang* noise that didnt sound natural to setting a card down and the spectator immediately checked the card to find the gimmick.
Have them examine the coins after the trick is done, meanwhile slipping the gimmick half dollar shell into your pocket.
Dont perform the trick on top of a spectators hand. I tried this when I first got it, and every spectator told me they could feel 2 things on there hand, instead of 1 coin.
Once I perfected all these mistakes I made, the trick seemed legit. Now if I could just learn to pinky break the metal wafer card into my deck of cards and make it seem as though the spectator chose the card randomly, then this would be an even more powerful trick, but Im still a n00b and a guy that just does tricks, not a magician.