An Aston & Mander & Co. Boxwood Slide Rule, English, circa 1900,stamped to the reverse of the slide DESIGNED BY MAJOR GENERAL HANNYNGTON, ASTON & MANDER & Co. Ltd, LONDON, with eight-bar slide and metal handle, moving over fifteen boxwood scales, in mahogany case,
case 33in x 2in x 8 3/4in (83.5cm x 5cm x 22cm)
An Aston & Mander & Co. Boxwood Slide Rule, English, circa 1900,stamped to the reverse of the slide DESIGNED BY MAJOR GENERAL HANNYNGTON, ASTON & MANDER & Co. Ltd, LONDON, with eight-bar slide and metal handle, moving over fifteen boxwood scales, in mahogany case,
case 33in x 2in x 8 3/4in (83.5cm x 5cm x 22cm)
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