4 sun 18 steps Yosegi/Ichimatsu Japanese puzzle box Himitsu-bako by Hiroyuki Oka

*The traditional yosegi pattern is different on each box, so it may not look exactly the same as in the photo. The traditional yosegi is used only on the top panel. The bottom panel has three types of natural wood designs, and the side panels are made with checkered yosegi. Opening method of the puzzle box : 18 steps Moving panels and Slide keys : have 4 panels / 2 keys Outside size : 4.3 x 3.2 x 2.1 inch (110 x 82 x 53 mm) Inside storage space size : 2.80 x 2.59 x 1.22 inch (71 x 66 x 31 mm) Include Description (solution sheet of how to open) and the gift box 4 sun size Japanese puzzle box. 4 sun is a Japanese measurements. 1 sun is about 1.18 inch / 3.0 cm. This puzzle box is opened by 18 steps. The Japanese puzzle box is made from only wood. This design puzzle box is made only by Hiroyuki Oka. All the internal gimmicks are made of wood, so the warmth of woodThe simple and gentle movement of the mechanism gives healing and comfort. The surface of the puzzle box is painted with a safe transparent paint.