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Details and Image

Item#TypeModel No.Model NameMakerCountryMaterialDiameterDateCondition
Molter Pocket-Watch CalculatorWilhem MolterGermanyNickel-plated Brass"2-1/4"c. 1925

Notes: Pocket-watch version of the Molter Circular Slide Rule. Scales identical with main knob rotation the scale disk and smaller side knob moving cursors. Inscription around pivot refers to maker/distributor: E. HECKENDORFF / BERLIN SO36 - GEGR. 1873.

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