" BRAND NEW " Mini Plastic Japanese Traditional Abacus SOROBAN 11 Digits Kids Calculating Here is a brand new mini plastic Japanese traditional abacus " SOROBAN " with 11 digits. Soroban or an abacus is a type of calculator used in banks, businesses and at homes for over 450 years in Japan. Encased in a strong durable frame and suspended with rods, the top beads represent fives and bottom beads represent ones.
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