Drill to improve calculation skills with a color-coded abacus. - Product Name: Miyamoto-shiki Soroban Thorough Repetition Drill - Supervision: Hiroshi Miyamoto - Publisher: Hoeisha Thank you for viewing. The drill appears to be in a clean condition, with no writing or markings. How about using it as a starting point for learning the abacus? The abacus will be wrapped in bubble wrap for shipping.