ATSF
| Atchison Topeka & Santa Fe | 30 |
BN
| Burlington Northern | 8 |
CBQ
| Chicago Burlington & Quincy | 1 |
CNW
| Chicago & Northwestern | 1 |
CRIP
| Chicago Rock Island & Pacific | 5 |
DRGW
| Denver & Rio Grande Western | 3 |
EL
| Erie Lackawanna | 1 |
GNBC
| Grainbelt Corporation | 1 |
GTW
| Grand Trunk Western | 2 |
KCS
| Kansas City Southern | 1 |
MKT
| Missouri-Kansas-Texas | 12 |
MP
| Missouri Pacific | 31 |
NCNG
| NCNG | 4 |
NW
| Norfolk & Western | 2 |
NWP
| Northwestern Pacific Railroad Company | 4 |
PC
| Penn Central | 1 |
RPCX
| Railroad Passenger Car Numbering Bureau | 1 |
SLSF
| Saint Louis-San Francisco | 1 |
SN
| Sacramento Northern | 6 |
SOO
| Soo Line | 1 |
SP
| Southern Pacific | 60 |
TM
| Texas-Mexican | 4 |
UP
| Union Pacific Railroad Company | 20 |
WECX
| Westinghouse Electric Corporation | 5 |
WP
| Western Pacific | 34 |