Double Puzzle Box
Hiroyuki Oka![Hiroyuki Oka](data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220%200%20210%20140%22%3E%3C/svg%3E)
This work was designed as a Christmas present for 2010.
This work is Nesting Secret Box..
The inner box's mechanism is traditional. And there is a moving bar called, "Kannuki".