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Elapsed time slide rule

Elapsed time circular slide rule used to estimate the wages for jobs undertaken on a day rate basis, designed, made and sold by Thomas Dunn, Accountant, Bank of Scotland, registered at Stationers' Hall on 1 December 1818

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Advanced search Search terms must be longer than two characters. Use a * as a wildcard to widen your search (for example, bagpipe* will find bagpipe, bagpipes and bagpiper).