Wheels of Time N Scale: 60-ft Arched Roof Baggage Express car - DLW*
These cars were seen on railroads across North America. Harriman cars were developed during the time of Edward Henry Harriman, who controlled the Chicago & Alton Railroad, the Union Pacific, the Southern Pacific, the Illinois Central, the Central of Georgia, the Pacific Mail Steamship Company, Wells Fargo Express Company, and directed the development of the "Common Standard Specifications" among the Associated Lines. This set of specifications allowed parts to be shared across all Harriman-controlled railroads, allowing economical bid prices due to the sheer size of standardized orders, standardized part inventories and methods for car repair.
These cars were designed with the a distinctive arched roof and diamond underframe crossbearers. The Arched Roof construction handled rainy weather better than clerestoy design - once lighting and ventilation problems were solved. Non-Harriman Arched Roof cars, while similar, had fished-belly underframes developed by Pullman Mfg. Co. and copied by others. Some of these 60-ft cars remained in use until the advent of Amtrak while others became maintenance-of-way cars.
About the DLW Scheme:
Built in 1925 by Press Steel Car Company as Nos. 2035 to 2064 for the Delaware Lackawanna and Western. They carried sealed mail, luggage, LCL express packages, newspaper and milk in canisters. These particular cars had their green paint and were never repainted into the Phoebe Snow scheme. They lasted through the Eric Lackawanna merged era in the 1960s.
*RR had very similar car, not exact prototype.