David made a card with the appearance of multiple card backs on the back and a joker on the front - someone here was selling a signed version.
I guarantee you that David made many, many gaffs for the Split Spades Lions - and probably the other decks as well. These designs are for decks that he uses in performances. In many cases, the decks were intended for his personal use, only later to be released for sale.
That same packet of gaff cards was sold originally as part of a "magician's set" of Split Spades - blue Lions, red Lions and the packet in a two-deck box.