This card, depicting the St. Louis riverfront and the train on the"high line" appears to have been issued about 1947.  The artist combined the features of an F-3 and E-7.  It is my favorite card issued by the GM&O.  

The card is obviously supposed to be on the Southern Rebel Route.  I believe this is based on a photo with a Alco DL-109.  The artist obviously took quite a few liberties and tried to give the motive power an EMD appearance.

This card was not issued by the GM&O, but St. Louis Union Station very much was a part of the railroad's operations.  It was the pivot point between the Rebel Route and the Alton Route to Chicago.

Shown here is Chicago Union Station, in its original splendor prior to the destruction of the Eastern section.  This was the Northern terminal for all GM&O Alton Route passenger operations.

This 1950's stylized card turns up more often than the others and the line artwork was used on GM&O's final pocket card timetables until the beginning of AMTRAK.

Moving down south, here is a postcard from the Jack Ferry collection depicting The Rebel at Jackson, Tennesee.  Heading up the train is one of GM&O's famous DL-109 units.

Well, as you can see, there's space here for one more great GM&O old style card here.  If you have one you would like to share, please e-mail me a copy of your scan and I'll be happy to add it.