Expansion New Karakuri puzzle box

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This puzzle box is based on the creation of Mr. Kamei in 2012 called Expansion Ⅰ.
Wooden puzzle boxes generally open with sliding movement, but this moves totally different from those "usual" puzzle boxes and the title is the clue to solve this puzzle box, though I personally had trouble opening it and could not figure it out, but once you open this box, you will be totally amaze how this box is made, you will be compelled to ask your friends to challenge the box and observe how they suffer!

It would be fun to try to open this box with a group of people at a party etc.

Size (box body) : 80×80×80mm
Size (strage space) : 31×31×28mm
Material : maple, keyaki(zelkova), walnut,black cherry, e.t.c.

About shipping
As for the box with this size, EMS is the only option we ship.
When you purchase 1 box, the shipping cost is as displayed, but when you order more than one, the shipping cost will vary depending on the total weight, so additional shipping cost will be charged.