This is a 27-digit soroban (abacus) from the traditional Japanese "Kamedake Soroban." This item features the "New Rank Specification" (white marks to prevent errors in multiplication), a unique feature of Kamedake. Both the frame and the beads are made of wood. • Number of digits: 27 digits • Size: Approximately 6.5 x 38.8 cm • Material: Wood • Condition: 中古 (Used, but beads move well) • Accessories: Outer box included • Special notes: The owner's family name is engraved on the back (please check the image) ※ Please note that this is a used item and may have minor scratches and signs of use. ※ Please purchase only if you accept the engraving on the back. Kamedake Unshu Retro Showa Black Ebony