细节
Three calculators:
a calculator by The Calculator Corparation, Grand Rapids, Michigan, with seven dials on wood base with labels for dollars and cents and units through millions; a Fowler's single-sided Magnum Long Scale calculator with instructions in leather pouch; and a Fowler's single-sided Universal calculator (3)
a calculator by The Calculator Corparation, Grand Rapids, Michigan, with seven dials on wood base with labels for dollars and cents and units through millions; a Fowler's single-sided Magnum Long Scale calculator with instructions in leather pouch; and a Fowler's single-sided Universal calculator (3)