Vintage Russian Soviet USSR Wooden Abacus Black Tan Brown Beads 7" x 5" x 1"

Sign up for Poshmark using my code TRAVELINGFROG to get $10 off your first purchase! Vintage Original Russian Soviet USSR Wooden Small Abacus with Black and Tan Brown Beads, Abacus is built on a wooden frame with metal rods holding tan brown and black beads. It is about 7 1/8" in length, 5 1/8" in width and 1 1/8" in its tallest. The abacus was meant to be handheld like a book, so the vertical sides of the frame are slightly curved to allow it to be easily held in the user’s hands. Great original condition. Maker tag is still attached inside and written in Russian. This is a Russian abacus as it has ten beads on each wire, except one, that has four beads. The row with four beads was used to calculate quarter-ruble fractions. The abacus has a total of eight rows. The number of rows places this abacus after 1916, as a Russian abacus prior to this time had an additional four-bead row.