A Hakone box, wood marquetry, late nineteenth century. It opens by sliding: each slat locks the next one. No force, no tools.
Turn it round to see the faces at the back; some pieces can only be reached from the other side.
A marquetry box with no hinges, no lock and not one screw. It opens in six moves, and the order is written nowhere: it is in the wood. You can turn it over in your hand — you will need to, because half the slats are on the faces you cannot see right now.
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