Photo 1 of Black long Di fang Digital Standard Abacus-28.5cm-Professional 13-Column Soroban Calculator (Functional and Educational Tool) Vintage-Style Chinese Wooden Abacus.

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Photo 1 of Black long Di fang Digital Standard Abacus-28.5cm-Professional 13-Column Soroban Calculator (Functional and Educational Tool) Vintage-Style Chinese Wooden Abacus.Photo 2 of Black long Di fang Digital Standard Abacus-28.5cm-Professional 13-Column Soroban Calculator (Functional and Educational Tool) Vintage-Style Chinese Wooden Abacus.