A stchoty, Russian abacus.

A stchoty, Russian abacus, early 20th century.
Stchoty (Russian form of Abacus), early 20th century. The stchety has horizontal rows of beads rather than vertical as in the Japanese abacus. It is specifically for counting rubles and kopeks. The lower three rows are for the kopeks. The rest position is with all the beads to the right.
 
Currently on display in:
Mathematics
Year made :
early 20th century
Inventory number :
1927-912