A 3D printable puzzle box, requires 5 actions to open, and is built from 10 parts.
It is created based on a wooden version, using the same parts as... the original (unknown origin, claims to be from 1772). Some of the original parts were missing or damaged, but I think my model has come close to the original. The "Fix pin" and "Fix plate" were part of a later repair (1950s maybe) due to the box cracking.
3d model print parameters
Wanhao Duplicator 4x
Some pieces needs to be rotated for good... print. I have only test printed it at 60% size due to limited print area. Tolerances between the moving parts are about right, but might work better at full size. The printed pins are easy to break, and hard to get correct size, if a sturdier box is desired replace them with a M4 (60%) or M8 (100%) -bolt depending on print size.