I believe it's still in use today, but about 40 years ago, I purchased a sandalwood abacus from Horie Soroban in Jimbocho. It's still priced quite high at a certain store. It's over 35,000 yen. Nowadays, one-touch abacuses are all the rage, and birch beads and boxwood beads are the norm. New ebony abacuses are hardly available. This time, I'm offering it for 13,000 yen. Thank you for looking.