A vintage green pocket sized reference book with the title Collins' Unique Gem Reckoner printed in silver lettering at the top of the front cover and on the spine. There is a user's Guide and Contents. p.508
Inscriptions & markings
'6/-' is written inside on the left endpaper.
This Reckoner is uniform with a series of Gem Dictionaries covering the English, French, German, Spanish and Latin languages and is therefore part of a comprehensive publishing plan. It is unique in that in addition to all the orthodox price and tonnage tables it contains much detailed an specially prepared information which is not available in other small reckoners. Constant and full use of the many tables will bring a twofold reward in time-saving and accuracy.