Jim Dick has dug up a very interesting photo of a Midland Continental train, from November, 1953.  This RR was a short line in North Dakota, with less than 70 miles of track, and owned no fright cars of its own at this date. 

https://groups.yahoo.com/neo/groups/STMFC/files/Midland%20Continental%20Railroad%20of%20North%20Dakota/

There are five x29’s in the first 18 cars, including one in Merchandise Service. 

At least two more PRR cars are further back in the train.

Is the 20^th car back, a ATSF rebuild, with ‘The Grand Canyon Line’ slogan?

Cars 24 and 25 are Soo stock cars.

How many more of the cars in this train can be identified?

Aaron Gjermundson