Trademarks Watch Cases, Pocket Watches, Precious Stones, Diamonds Roy Ehrhardt Vintage comb-bound and paper-covered book showcasing a curated list of trademarking details of watch cases, pocket watches, precious stones, and diamonds from American manufacturers. Includes black-and-white illustrations as well as duplications of trademark documents as well as much more valuable information. 128 pages
0-913902-06-3
Heart of America Press
1976
Roy Ehrhardt
Reference