ATSF
| Atchison Topeka & Santa Fe | 1 |
BN
| Burlington Northern | 3 |
BO
| Baltimore & Ohio | 1 |
CBQ
| Chicago Burlington & Quincy | 2 |
CI
| Cambria and Indiana Railroad Company | 1 |
CIM
| Chicago And Illinois Midland | 1 |
CMO
| Chicago St Paul Minneapolis & Omaha | 1 |
CNW
| Chicago & Northwestern | 6 |
CRIP
| Chicago Rock Island & Pacific | 2 |
CRR
| Clinchfield | 1 |
DH
| Delaware & Hudson | 2 |
EJE
| Elgin Joliet and Eastern | 1 |
EL
| Erie Lackawanna | 1 |
FDDM
| Fort Dodge Des Moines & Southern | 2 |
GA
| Georgia Railroad | 1 |
GMO
| Gulf Mobile & Ohio | 1 |
HCTX
| Martin Marietta Corporation | 1 |
IC
| Illinois Central | 2 |
LM
| Litchfield & Madison | 1 |
LN
| Louisville & Nashville | 1 |
LV
| Lehigh Valley | 1 |
MILW
| Milwaukee Road | 5 |
MKT
| Missouri-Kansas-Texas | 2 |
NYC
| New York Central | 1 |
PRR
| Pennsylvania Railroad | 2 |
RDG
| Reading Railroad | 1 |
SAL
| Seaboard Air Line | 1 |
SLSF
| Saint Louis-San Francisco | 1 |
SP
| Southern Pacific | 1 |
TN
| Texas and Northern Railway Company | 2 |
VGN
| Virginian Railway | 1 |