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 the mainstream, and most have birch or boxwood beads. New ebony abacuses are rarely available. This time, I'm offering it for 13,000 yen. Thank you for looking.