1 3/4″ wide. (actual: 1.711″ wide x 2.228″ high x .462″ deep). Brass body. Brass shackle. Catalog #: 3, first appears in catalog of 1869. Post key. “W.BOHANNAN. BROOKLYN.N.Y. PAT.APR.17.1860 3” is stamped on the obverse of the body.Patent # 27883.