A captivating, sizeable well-crafted wooden puzzle. The objective is to open the lock. A very hard puzzle. Made by Siebenstein-Spiele.
Based in Munster, Germany, Siebenstein-Spiele was founded in 1992. Although the company is mainly known for board games, Siebenstein-Spiele also makes many wooden puzzles, several of which have been designed by company founder Jürgen Reiche.