Japanese abacus, c 1900.

Japanese abacus, c 1900.
Japanese soroban or abacus with 13 columns, each with 5 beads below the bar and one above.This represents an intermediate form between the original Chinese abacus and the modern Japanese type. This arrangement was common from the late 19th century until the 1930s.
 
Currently on display in:
Mathematics
Year made :
c.1900
Inventory number :
1989-658