2″ wide. (actual: 1.949″ wide x 2.554″ high x .526″ deep). Bronze body. Bronze shackle. Post key. Clevis and chain. No spring on dust guard. “W.BOHANNAN BROOKLYN, N.Y. PAT. JUNE 25.78 75” is stamped on the obverse of the shackle. Catalog #: 75, first appears in catalog of 1880.Patent # 205171.