The puzzle is to open the box.
Not a normal puzzle box of the ilk of a traditional Japanese puzzle box, this box is completely different. It is actually a sequential discovery puzzle. You need to find and use tools contained in the puzzle to advance to the next step until you can eventually open the box.
This a multi-step opening box is the latest design by Jürgen Reiche. Jürgen says you'll need both your head and your hands to discovery the mystery of this one!
Size of box: 115mm x 76mm x 60mmThere might look like there should be a lot of space inside this box. But the only usable space is the specially marked "Card Storage" compartment. The other space inside the box is used in the solving of the puzzle and how the mechanism work. Made from laser cut veneered plywood; a very good quality finish. Difficulty Level 6 stars out of 7. A very hard puzzle! Card Storage compartment inside the box: