Vintage Fearns Circular Slide Rule, Inches-Millimetres Conversion Calculator

  • $41.99
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Here is a vintage Fearns Circular Slide Rule, Inches-Millimetres Conversion Calculator. Manufactured by Fearns Calculators company and constructed from perspex and plastic, made in England, the vinyl case is marked “Sole North American Distributors:- Industrial Scientific Instruments Ltd. Montreal Que. Made in England”.

Slide rule shows light ware, measures 5 1/8” wide.

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Although we try to give an accurate description, remember, this is a vintage item and there may be small imperfections from age or flaws from production that we have not noticed or noted in the comments. We try to list all the deficiencies, marks etc. Please review ALL pictures closely. All our items are as is, all photos are of the actual item that will be shipped.

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