AAR
| Association of American Railroads | 4 |
BWCX
| GE Plastics | 1 |
CBQ
| Chicago Burlington & Quincy | 1 |
CP
| Canadian Pacific Railway | 1 |
EBT
| East Broad Top | 4 |
GMO
| Gulf Mobile & Ohio | 1 |
MILW
| Milwaukee Road | 1 |
PRR
| Pennsylvania Railroad | 55 |
REX
| Railway Express Agency, Inc. | 1 |