2 3/4″ wide. (actual: 2.524″ wide x 3.330″ high x .818″ deep). Bronze body. Bronze shackle. Post key. Heavy tumbler lock for RR 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. “W BOHANNAN BROOKLYN, N.Y. PAT. JUNE 25,78 C 102” is stamped on the obverse of the shackle. Catalog #: 102, first appears in catalog of 1880, listed in index only.Patent # 205171. We have not found a non-logo #102 seal as yet. When we do we will post it.