This came from an old magician’s estate purchase.
The removable disc is missing.
Maybe some Tenyo collector has a use for this.
Comes with a copy of the original instructions; no box.
Selling as is for parts.
Effect: The magician shows a small hinged plastic board containing two different colored spots. He asks a spectator to name the colors and then closes the board. Now he snaps his fingers and the board opens up showing that the spots have changed color! Without ever removing the board from the spectator’s sight, the magician rubs one of the colored spots and it instantly changes back to its original color! All may be examined. They will find nothing to explain the workings of this great little pocket trick.