ALAB
| Alabama Railroad | 1 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BO
| Baltimore & Ohio | 3 |
BRC
| Belt Railway of Chicago | 3 |
CKIN
| Chesapeke & Indiana | 1 |
CMPA
| Madison Railroad Division of City of Mad | 1 |
CNW
| Chicago & Northwestern | 1 |
CO
| Chesapeake & Ohio | 4 |
CR
| Conrail | 17 |
CRIP
| Chicago Rock Island & Pacific | 1 |
CSDX
| Metropolitan Water Reclamation District of Greater Chicago | 1 |
CSL
| Chicago Short Line Railway Company | 2 |
CSS
| Chicago South Shore And South Bend | 10 |
CSX
| CSX Railroad | 19 |
CWP
| Chicago West Pullman & Southern | 2 |
DLW
| Delaware Lackawanna & Western | 2 |
DUPX
| Du Pont De Nemours and Company Incorporated | 1 |
EJE
| Elgin Joliet and Eastern | 2 |
EL
| Erie Lackawanna | 2 |
ERIE
| Erie Railroad | 1 |
GDLK
| GDLK | 1 |
GLLX
| Great Lakes Locomotive | 2 |
GTW
| Grand Trunk Western | 4 |
IAIS
| Iowa Interstate | 4 |
IBCX
| Indiana Box Car Corporation | 2 |
ICG
| Illinois Central Gulf | 4 |
IHB
| Indiana Harbor Belt | 43 |
IM
| IM | 1 |
INLX
| Incoal Company | 1 |
INRD
| Indiana Railroad | 1 |
KBSR
| Kankakee Beaverville and Southern Railroad Company | 3 |
LSMS
| Lake Shore Michigan Southern Railroad | 1 |
METX
| METRA | 2 |
MON
| Monon Route | 4 |
MSO
| Michigan Southern | 2 |
NKP
| Nickel Plate | 3 |
NS
| Norfolk Southern | 1 |
NW
| Norfolk & Western | 4 |
NYC
| New York Central | 9 |
PC
| Penn Central | 4 |
PREX
| Pioneer Rail Equipment | 1 |
SCIH
| South Chicago & Indiana Harbor Railway C | 10 |
SMRS
| Springfield (MO) Railway Services | 1 |
SOO
| Soo Line | 2 |
TR
| Tomahawk Railway L.P. | 1 |
TTX
| TTX Company | 1 |
WBCR
| Wabash Central | 1 |