Wooden Abacus Kanban, Japanese, Mid-century

Oversized abacus kanban or "store sign." A whimsical folk art piece that is also functional, if one is inclined to learn how to use one. It has been known that sometimes, some of these were used in schools to teach schoolchildren how to count, before computers.  Wood, Japanese, mid-century. Dimensions: 11x2x43.25 in.