⚫︎ This is an abacus made by the historic Unshudo, with 27 digits and 4 beads per column. Purchased in 1983 (42 years ago). ⚫︎ Size: Length: Approximately 39cm, Thickness: Approximately 2cm Width: Approximately 6cm ⚫︎ A sticker with the date it was first used is attached and will be shipped as is. ⚫︎ While there is no major damage and it can still be used, it is an antique, so please consider this with an understanding of age-related minor scratches, etc. #ShowaRetro