Scotch and Soda (Sterling Magic)

Is the most used coin set by amateurs and professionals. This is truly a spell binding bit of magic. Two coins are shown, a copper coin and a silver coin. Both coins are placed in the hands of your spectator. When the spectator closes his hands around the coins and you say the magic words, the once copper coin changes to a real US quarter without you touching it. All pieces can be examined after the trick.