2 1/4″ wide Actual: 2.213″ wide x 2.820″ high). Brass body. Brass shackle. Post key. No spring dust guard. Catalog #: 5, first appears in catalog of 1869. “PATD APR.17.1860. 5 W.BOHANNAN BROOKLYN” is stamped on the obverse of the shackle.Patent # 27883.