A large hardback, PRE-FILED ELECTRICAL CATALOGS, A BOUND COLLECTION OF MANUFACTURERS CATALOGS ON ...ELECTRICAL EQUIPMENT, MATERIALS, SUPPLIES AND ALLIED PRODUCTS, 1951/1952. McGraw Hill Catalog Service. Top of spine is torn and book has smudging and wear but still in good condition with no writing inside. Over 202 pages that are fully illustrated from many manufacturing companies. An oldie and and a goody!