Show a black poker chip on your outstretched palm.
Close your hand, open it, and the poker chip has changed to WHITE!
Again close your hand, then open it. The poker chip has changed back to BLACK!
Everyone thinks the poker chip is white on one side and black on the other. Close your hand and open it again. Now the poker chip is CHECKERED on both sides! Feel free to hand out for examination.
Completely mechanical brass Masterpiece! Supplied in a foam lined jewelry box.