Author: Selwyn, A. (Advisory Ed.):
Title: Jewellers' and Watchmakers' Pocket Book.
Description: London, Heywood & Company Ltd, 1951 1st Ed., small hard cover, approx. 3" x 5", landscape maroon cloth bds, Good, gilt lettering to upper bd and spine, contents clean and tight, pp503. Content sections include: Weights and Measures; Metals; Gemstones; Horology; General and Commercial.

Keywords: Jewellers watchmakers pocket book guide weights measures metals gemstones horology commercial business troy avoirdupois grams coins gravity melting points hardness tests gold carat alloys platinum


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