Details
A Lightning Calculator
with seven dials in black metal plate in sloping walnut plinth -- 13¼in. (33.5cm.) wide, 20th century, by The Lightning Calculator Co. Grand Rapids Michigan U.S.A.
with seven dials in black metal plate in sloping walnut plinth -- 13¼in. (33.5cm.) wide, 20th century, by The Lightning Calculator Co. Grand Rapids Michigan U.S.A.