FISHER LABS VERY OLD METAL DETECTOR CATALOG Published by Fisher Research Laboratory  Palo Alto Calif. (no date, about 1950s) 8 pages including the front and back wrappers. Profuse pictures. In VG+ condition with a very mild fold in the middle. Tightly bound. No owners marks or labels. Free shipping in the U.S.  Don’t know if this company is any relation to Mel Fisher, the famous treasure hunter, who found the Atocha. Free shipping in the U.S. (See all 16 pictures)