Wood colors vary.
The ninth box in the Puzzle Box series from Siebenstein-Spiele, this puzzle is the largest. There are four sliders, one on each side of the box that move independently of each other. Also called the Laby Box, the name might give you a clue as to how the box opens.
Made in laser-cut wood and acrylic 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.