This is "Unshu Soroban," a traditional craft designated by the country. It has the certificate of the Unshu Soroban Cooperative, and the manufacturer is Unshu Maruho Soroban, a top brand of soroban. It is a rare 15-digit soroban. Approximately 6.5cm x approximately 22cm x approximately 1.5cm, approximately 100g. There is a small chip on one of the beads, but I don't think it will cause any particular problems in use. It is very old and has some dirt, but the beads move smoothly. However, please understand that this is a used item before purchasing.