The objective is to fit all the pieces into the square featured on the board. There is only one solution. Seemingly simple, this puzzle actually ranks 5 out of 5 in difficulty.
The Calibron 12 was originally designed in 1933 by Theodore Edison, son of the famous inventor Thomas Edison, and made by his company, Calibron Products of West Orange, N.J.
This handcrafted piece is made from precision cut woods with at least 4 different woods in each puzzle. Ash, Maple, Walnut, Oak, Mahogany, Birch, Cherry, Alder, and other woods may be used with each puzzle have a little unique look. The pieces are very strong at 1/4" thick and have a nice finish. Made in the USA.
Measures 8.75 x 7 inches.