Heavyweight Observation (Open Vestibule) Passenger Cars
- (undecorated) (6)
- Atchison Topeka & Santa Fe (ATSF) (1)
- Baltimore & Ohio (B&O) (2)
- Canadian National Railway (CN) (1)
- Canadian Pacific Railway (CPR) (1)
- Central Railroad of New Jersey (CNJ) (3)
- Chesapeake & Ohio (C&O) (2)
- Chicago & North Western (CNW) (2)
- Delaware, Lackawanna & Western (DL&W) (2)
- Denver & Rio Grande Western (D&RGW) (2)
- Erie Railroad (ERIE) (1)
- fantasy: TCA (1)
- Great Northern (GN) (1)
- Gulf, Mobile & Ohio (GMO) (1)
- Milwaukee Road (MILW) (2)
- Missouri Kansas Texas (MKT) (1)
- Missouri Pacific (MP) (1)
- New York Central (NYC) (4)
- New York, New Haven & Hartford (NH) (3)
- Northwestern Pacific (NWP) (1)
- Pennsylvania Railroad (PRR) (3)
- Pullman (3)
- Reading (RDG) (1)
- Southern Pacific (SP) (4)
- Southern Railway (SOU) (3)
- St. Louis-San Francisco (SLSF) (1)
- Union Pacific (UP) (3)