Selling due to clearing out my parents' house. This item was purchased in 1977, making it quite old. It's a 23-digit black ebony abacus from Unshudo. It was kept in its box as part of a collection. I hope to pass it on to someone who needs it. The outer box is not included due to aging. Thank you for your understanding. *We do not accept cancellations after purchase or returns after receipt.