This is a famous puzzle designed by Stewart Coffin 40 years ago
. Wood copies must be made with great accuracy and have become sought-after collectors items selling for several hundred dollars. This leads to the current state of affairs where many people have never even seen this excellent puzzle. I had never seen one, so I exported the pieces from BurrTools and printed out a copy. Now anyone can order an inexpensive copy of this puzzle.
Six pieces, all different, assemble into a cube with side 32mm or about 1.25 inches.
BurrTools STL export parameters: Unit Size: 8.0, Bevel: 0.2, Offset: 0.0, Wall Thickness: 1.0, Tubes size: 0.0