Two very old switch locks from a retired railroader.
Vintage 1956 PRR Pennsylvania Railroad Padlock Lock & Chain Obsolete Not Working
Seaboard Air Line Railroad Company Safety Rules Engineering &Signal Department
THE PENNSYLVANIA RAILROAD Brake And Train Air Signal Instructions No. 99-D-1
THE PENNSYLVANIA RAILROAD Brake And Train Air Signal Instructions 1953
Book Pennsylvania Railroad Brake and Train Air Signal Instructions 1953 Vintage
