Tenyo Mystery China Box Pyramid Mystery Set - Rare Item Includes Instructions (Color Photocopy) * Mystery China Box - 2001 Designed by: Tomoyuki Shimomura * Pyramid Mystery - 1994 Explanation by: Tomoyuki Shimomura There are minor scratches from long-term personal storage. Each functions without issue. The balls for the Mystery China Box are similar to the original ones. I have examined them carefully, but as I am not a professional, there may be oversights. I hope you will understand and agree before purchasing.