Educational Cardboard The First Four Rules Of Arithmetic Charier Père Circa 1860

Educational cardboard titled the first four rules of arithmetic by Charier père around 1860. Two octagonal printed cardboard discs (maximum width: 38 cm), connected by a golden nail. The upper disc is pierced with small windows. A wooden driving button allows it to rotate. By operating the upper disc, the child performs operations in the 4 rules; the results immediately appear in the four corresponding windows. Instructions on the back. 4 engravings (scenes of children being studied) and various ornaments. By operating the top disc, the child poses problems in the 4 basic operations (addition, subtraction, multiplication and division) and sees the result immediately appear in a small window. Very rare.