The Robert Jackson items I have had the pleasure of handling have all been beautifully made and this one no exception and few of the Jumbo Card Zig Zags were made.
A jumbo card is shown and examined and a three door case is shown and one door is removed. Keeping their eyes on the jumbo card the magician slides it into the case and removes the other two doors.
Holding the case in a horizontal position the center section is slowly pushed down creating the Zig Zag illusion. The center section is slid back into position with the doors replaced and the card is shown to be restored!
This beautiful piece from 1984 and includes instructions. Condition very fine.