Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/4 Beads 27 Rows ST66 kayoi-tokkuri or sensubukuro

or sensubukuro

5 cm wide x 10 cm tall x 8 cm deep

Light discolorations

On the back of the fan says Showa Year 60 September Aichi prefecture

Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/4 Beads 27 Rows ST66 kayoi-tokkuri or sensubukuroJapanese Soroban Abacus Calculator Tool This is a vintage Japanese abacus, or soroban. It is a mathematics calculating tool and is considered the first calculator in Japan. The Japanese abacus is different from the parent Chinese version. It has a top section of single beads and a bottom of stacked beads, usually five. At the very center is one unmarked stack used for decimal places for more complicated calculations. Many primary schools all over