Duplicity by John Bannon (DVD + Trick)
A red-backed Ace from one packet changes places with a blue-backed Ace in another packet.
The selected Aces appear face-up in each respective packet. Then their backs prove to be different. As a final climax, all of the other cards are shown to be blank!
Everything is examinable. Perfect for mentalists, table-hoppers, and card magic enthusiasts!
Step-by-step DVD instructions and a photo-illustrated e-book illuminate the workings of Duplicity. All necessary cards, specially printed by the U.S. Playing Card Co. are supplied.