Offered is probably what is a Security Badge Across the front of the Badge says Pinkerton 1824 Special Service. Badge is in the form of a Shield with Eagle on top. Underside is marked F.G. Clover Co. New York, N.Y. Badge measures about 3 x 2" and in very good condition. I would place it somewhere around the 1940's to 50's. Buyer to pay shipping & insurance.