This is a steel body C&O (Chesapeake & Ohio) Railroad switch lock with chain, made by Adlake, patent date 1936. There is no key.
The lock body is heavy steel, about 3-1/2" high, total weight about 13 ounces. The drop (keyhole cover) has the maker's name- Adlake- in raised script, an older style and still has strong spring action. The backside of the lock body is stamped "C & O" with a long patent number underneath (2040482) that was issued in 1936. The hasp is steel, and on the back side has "11" stamped near the hinge end. Nothing is stamped on the front side of the hasp. This padlock comes with what appears to be an original chain.
The C&O line ran from 1869 until 1972, when it became part of the Chessie system. It had lines in 11 states, from West Virginia into the Midwest, hauling lots of coal to Midwest cities from eastern mines.
This lock came from a RR employee's collection- he is from northern Indiana, where many lines converge going to and from Chicago..
CONDITION- This lock appears to have very little use. The silvery nickel or zinc coating is still quite solid, on lock, hasp and chain. The underside of the hasp has a raised ridge on it from the casting process and that shows no wear where the lock would normally be hanging and swinging from the switch or chain. There are a few spots which the photo makes look much darker than in real life- I did not try to clean the lock. The backside of the body has a number of tiny marks and scratches. Surface of the main body is quite smooth, no real rust. The shackle is a bit rough with small pits from previous rust, clean now. The chain is still quite smooth, no obvious rust. Because of weight I cannot ship this first class package mail but must send it priority mail; postage is offered at cost..
Check my other railroad keys and locks offered on my Ruby Lane site!