● Unshu Soroban Kyodo Kumiai (Unshu Abacus Cooperative) abacus, 27 digits, practical type. ● Size: Width: 38.5 cm Height: 6.5 cm Depth: 2 cm ● Name inscribed on the back center of the abacus (photos 2 and 3), and the maker's name? (photo 6). ● There are small scratches and minor stains, but it seems it can still be used.