2″ wide. (actual: 1.957″ wide x 2.578″ high x .516″ deep). Bronze body. Bronze shackle. Post key. “W.BOHANNAN BROOKLYN, N.Y. PAT. JUNE 25.78 74” is stamped on the obverse of the shackle. No spring on dust guard. Catalog #: 74, first appears in catalog of 1880.Patent # 205171.