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The piano box in the design of a piano is a box of tricks by Jean Claude Constantin. There are two metal pins and a turning wheel on the front. How can the box be opened? Note: No solution is provided for this puzzle. Jean Claude Constantin lives and works in Germany, where he has been developing and manufacturing all kinds of puzzles for decades. His portfolio includes hundreds of different trick boxes, labyrinths, trick locks, rope and metal puzzles and much more in a wide range of difficulty levels. The puzzles, most of which are handmade in Germany, are characterized by their high quality and creativity. Jean Claude Constantin's puzzles are mainly available at Christmas markets and are not mass-produced. However, we can offer you a small selection from his range.
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