4 1/2″ high x 2 1/2″ wide. (actual: 2.400″ wide x 3.683″ high x .636″ deep). Bronze body. Bronze shackle. Post key. Clevis and chain. The number on the shackle may be a key code or simply a sequential number. No spring on dust guard. Catalog #: 83, first appears in catalog of 1922.