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Details
A multiple-scale slide-rule
by Aston & Mander, 25 Old Compton Street, Soho, London, Designed by Major Genl Hannington, with nine fixed boxwood scales on mahogany base, two alternative five-scale slides and mahogany case with detachable hinged lid with housing for the spare slide -- 27in. (69cm.) wide
by Aston & Mander, 25 Old Compton Street, Soho, London, Designed by Major Genl Hannington, with nine fixed boxwood scales on mahogany base, two alternative five-scale slides and mahogany case with detachable hinged lid with housing for the spare slide -- 27in. (69cm.) wide