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Willgodt T. Odhner invented the pinwheel calculating machines in...
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This bakelite and brass Fuller's cylindrical slide rule with serial...
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Fowler & Co. in Manchester made this pocket calculator during the...
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This mint condition Type I model with serial number 47218 was manufactured...
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Otis King Logarithmic Calculator Model 'L'. This is a logarithmic...
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This ‘Addiator’ Calculating Machine was made for adding and...
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This is a Faber-Castell 10 inch slide rule from the 1960’s. Made...