Russian Schoty
10 columns / Vintage / Wood. This abacus was used for counting rubles and kopeks in Russia. The beads are arranged in 8 columns of 10 beads each and 2 columns of 4 beads. The 4-bead columns were used to calculate quarter kopeks and/or to split numbers. The black beads mark the middle 5, the red the 1000. place. There is also no horizontal bar between the beads like on the Chinese Suanpan or Japanese Soroban.
July 20, 2024