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Item#TypeModel No.Model NameMakerCountryMaterialDiameterDateCondition
Fowler's Magnum Textile CalculatorFowler's Calculators Ltd.UKCast metal (late)"4-5/8"c. 1965-1976

Notes: "Single sided textile calculator with two short scales equivalent to 13"" linear slide rule. Outer scale subdivided in tenths and inner scale subdivided in sixteenths. Also has scale (-40 to +60). Worn rexine covered metal back. No serial number."

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