Chinese abacus GM

Used since the second century bc. J-c, the chinese abacus was known as sunpan, it and also called counting frame because it is a calculation tool for teaching aids in elementary mathematics and counting for children. This model is composed of 13 rows of hardwood and varnished beads with 2 beads on each rod of the upper deck and 5 beads in the bottom, it is the brand lotus flowers brandt but the label has been removed. The whole is in good condition, it was brought back a few years ago directly from china by lovers of the country in memory. Weight 0, 410 kg. Length 31.5 cm. Height 15 cm.