One of the most baffling coin trick in magic and yet very simple to do. The magician borrows a coin, has it marked and proceeds to knock it into a bottle. Both bottle and coin can be examined and when returned to the magician, he removes the coin from within the bottle. Both the bottle and the marked coin can be passed out to the audience for closer inspection.
Totally automatic and highly visual.
Delivered with required equipment, and a real 1/2 dollar.