2 1/2″ wide (Actual: 2.509″ wide x 3.228″ high x .831″ deep). Bronze body. Bronze shackle. Post key. Extra heavy tumbler lock. For Railroad Cars and Switches. Clevis and chain. Spring dust guard. There is a hole going through the case and the shackle to accept a wire seal. Catalog #: 87, first appears in catalog of 1880.Patent # 205171. More… We have not found a non-logo as yet.