Ketcham McDougall Retractable Chatelaine Brooch. This piece is sturdy enough to old a small ladies pocket watch, locket, watch fob, mechanical pencil or other sentimental item. The back is signed Ketcham McDougall New York, Patent Feb. 24 1903 and April 26 1910. These pieces were made for ladies so that they could easily carry utilitarian items for every day use. Most widely used for carrying Pince Nez glasses. This mechanical pin is gold washed brass and measures 9/8 inches round. It closes with a C clasp. The front can be engraved. This is a a truly great gift. This estate Ketcham McDougall brooch pin is in good working condition.