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Details and Image

Item#TypeModel No.Model NameMakerCountryMaterialDiameterDateCondition
The Mechanical Engineer Pocket CalculatorScientific Publishing Co..UKNickel-plated brass"2"c. 1898-1900

Notes: "Small version of the calculator with 1-3/4"" scale disc. This specimen has no inscription or ""SWISS"" stamped on the center brass hub. Flange on small knob is thin like most others."

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