R.”. 2 1/2″ wide. (actual: 2.396″ wide x 3.063″ high x .615″ deep). Bronze body. Bronze shackle. Post key. Clevis and chain. No spring on dust guard. Catalog #: 83, first appears in catalog of 1880. “WILSON BOHANNAN BROOKLYN,N.Y. 83” is stamped on the obverse of the shackle.