CALCULATORS and RULES
Two early Otis King calculators:
Details
Two early Otis King calculators:
the first, No.8980, with nickel-plated body and paper label, in fitted leathercloth-covered case with makers' label Carbie Limited, London; the second, No. 5149, similar, with black scales but without paper label (2)
the first, No.8980, with nickel-plated body and paper label, in fitted leathercloth-covered case with makers' label Carbie Limited, London; the second, No. 5149, similar, with black scales but without paper label (2)