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Details and Image

Item#TypeModel No.Model NameMakerCountryMaterialDiameterDateCondition
Molter Circular Slide RuleWilhem MolterGermanyNickel-plated Brass"2-1/2"c. 1925

Notes: "Middle"" model with fine milling on outer rim, no slot on screw in center knob, 12mm knob diameter on both sides, and opaque grips on cursors. Case has metal clasp similar to a coin purse. Operates like Halden Calculex."

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