1978. You have your audience remember a selected card that is then shuffled a number of times into the deck. You take out a small pocket knife, pick up the deck and spring it into the air. You thrust the knife into the cards and the chosen card appears impaled on the knife.
I believe John Kennedy was one of the performers/staff at Al’s Magic shop Set comes with a mini real Swiss Army knife so the quality is certainly there. Near mint or better contents with original instructions, bag and knife sheath.