2″ wide. (actual: 1.953″ wide x 2.530″ high x .530″ deep). Bronze body. Bronze shackle. Post key. Clevis and chain. Spring dust guard. Catalog #: 77, first appears in catalog of 1880. “W.BOHANNAN BROOKLYN, N.Y. PAT. JUNE 25.79 77” is stamped on the obverse of the shackle.Patent # 205171.