A touch-stone for gold and silver wares, or, A manual for goldsmiths and all other persons, whether buyers, sellers, or wearers of any manner of goldsmiths work discovering the rules belonging to that mystery and the way and means how to know adulterated wares from those made of the true standard allay, and what are the true weights appointed for weighing of the same - William Badcock (Printed for John Bellinger ... and Thomas Bassett, 1677)
Goldsmiths'-Kress no. 02199. - Includes index. - OCLC, 20888839. - Reproduction of original from Goldsmiths' Library, University of London. - Wing, B382