Pointer by Phil Goldstein (1976)
 
Several cards displaying arrows are shown, all pointing in the same direction. One arrow is turned the opposite way, yet instantly all of the other arrows mysteriously change direction to match. The transformations continue under increasingly impossible conditions, with the cards repeatedly changing orientation and color.
 
For a final climax, one card is revealed covered in multiple arrows pointing in different directions at once, creating an impossible visual ending.
 
CONDITION NOTES:  Very good condition with light use.