DERBYSHIRE (USA) Precision Watch & Clockmaker's Lathes and Micromills: complete Catalogue early 1940s (red cover). This is the version with 46 extra inserted plate photographs. 62 pages.
DERBYSHIRE - all the information and illustrations that are different (there was much duplication in the Company's catalogs) extracted from a collection of five Derbyshire Catalogues from the 1940s until recently that gives a complete picture of the company's products and enabling identification of rare and unusual accessories. 127 pages.