This is a puzzle with a hidden mechanism I have had for probably 20 years and recently found. The two halves of the box can not rotate. There is something inside that rattles and rolls around, perhaps a bearing. I can pull the halves very slightly apart, enough to see a wooden circular interior in the middle of the octagon, and 2 dowels on either side of the cylinder that prevent the halves from rotating.
I have tried carefully pulling and pushing holding the puzzle at many different angles.
Anyone know the solution to this puzzle or have suggestions?