ATSF
| Atchison Topeka & Santa Fe | 12 |
BM
| Boston & Maine | 2 |
BN
| Burlington Northern | 2 |
CS
| Colorado & Southern | 1 |
CTS
| Cumbres & Toltec Scenic | 1 |
CV
| Central Vermont | 2 |
DGNO
| Dallas Garland & Northeastern | 1 |
DRGW
| Denver & Rio Grande Western | 3 |
GT
| Grand Trunk Railway | 1 |
MEC
| Maine Central | 1 |
MKT
| Missouri-Kansas-Texas | 2 |
MP
| Missouri Pacific | 2 |
PVS
| Pecos Valley Southern Railway Company | 2 |
RPCX
| Railroad Passenger Car Numbering Bureau | 1 |
SP
| Southern Pacific | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
UP
| Union Pacific Railroad Company | 6 |
WFS
| West Isle Line Incorporated | 1 |