DETAILS
Of traditional form, this vintage portable abacus (soroban) has a rectangular frame holding (21) rods, with one top bead, divided by a reckoning bar / beam above a stack of five beads.
PLACE OF ORIGIN
Japan
PERIOD
Taisho (1912-26) | Early 20th century
DATE
Circa 1920
DIMENSIONS
Width 14 Depth 1 Height 3.25 inches