4 Steps Visible Lock by Robrecht Louage
Winner of the Jury Grand Prize at the 2011 IPP Puzzle Design Competition in Berlin.
Materials: high-pressure laminate (Trespa), acrylic, steel balls
Goal: Remove the coin.
If you have any questions or remarks, please contact me before bidding!
Shipping from Belgium, EU; shipping cost at buyer's expense (again, contact me for details)