The Collectors Sale

Lot 716

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A Halden Calculex

circular slide rule, in nickel-silver, diameter 6.2cm, in leather case with instruction booklet

Sold for £68

Result plus buyers premium

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circular slide rule, in nickel-silver, diameter 6.2cm, in leather case with instruction booklet

Auction: The Collectors Sale, 27th Jan, 2022

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