This is the Gordian Knot Puzzle by Robert Yarger. Only 28 were crafted and it takes a minimum of 36 steps to solve. AMAZIN… | Puzzle box, Puzzle, Decorative boxes
Gordian's Knot by Binary Arts
Gordian's Knot Puzzle - Techglimpse
Gordian Knot Puzzle kaufen - kubekings.de
ThinkFun GORDIAN'S KNOT Brainteaser Challenge Take Apart Puzzle & Solution Guide | eBay
Gordian knot with Bevelled Edges by CEL | Download free STL model | Printables.com