This work is a second version Barrel Puzzle Box created by Akio Kamei.

Crafted in March 2016, this puzzle requires more steps than the original Barrel P-8 puzzle produced in 1983.
Three steel balls are used in the mechanism, making the design more complex.

Measures 4.72 x 4.41 x 4.41inches or 112×112×120mm.

Limited number, it is crafted in Walnut and Cherry and will arrive with an opening diagram and gift box.