The Companion puzzle box, originally designed by Benno de Grote; a Dutch university professor.
The story Benno de Grote told about this design is:"I made the first version of the box when I was in the last year of my high school. This version didn't have any 45 degree cuts, and the box would have a lid instead of the way it opens up now. The box was a birthday present for a close friend. That’s why I chose this design.I wanted to make a box with nothing which could move on the outside. Most boxes have sliders or at least something to Interact with on the outside of the box."
The puzzle box is made from laser cut plywood. It does have space inside to be able to include a small gift, folded bills, coins or a note so with the heart motif it makes a great box to put a special present for a special someone inside. Once opened there's space inside this box, size 2.5" x 2.5" x 2" inner space, and it's ok to put somethings inside without interfering with the mechanism.
Beautiful and tricky to solve puzzle box, a must for any one that love puzzle boxes.