The first streamlined, non-articulated diesel locomotive, General Motors EMD model EA-EB #51, on the Baltimore and Ohio Railroad's Royal Blue in 1937. This was GM's first production model diesel locomotive. The southbound New York-Washington DC train is pictured on the lower level track at Camden Station in Baltimore, Maryland

Photo by R. L. Wilcox, reprinted in Royal Blue Line by Herbert H. Harwood, Jr. ( ISBN  0-89778-155-4).
© Bruce C. Greenberg, 1990

Royal Blue (train)

cropped by User:JGHowes

Yes

It is believed that this low-resolution version depicting a unique historic event — the first streamlined, non-articulated diesel locomotive in service on the B&O's Royal Blue — is permissible Fair Use solely for the Wikipedia article about the Royal Blue because:

1. it portrays a historically significant event, i.e., the beginning of the dieselization of the world's railroads;
2. the image illustrates the aesthetic appeal of diesel streamlining on the Royal Blue far better than mere prose alone;
3. as a greatly reduced, low-resolution version, this image is non-reproducible for commercial purposes.
4. use of this low-resolution version does not diminish the value of the original media to the copyright holder nor interfere with the media's original purpose, nor will it dilute the importance or recognition of this image in connection with the copyright-holder.
5. it meets all criteria in WP:NFCC.

Not replaceable. It is a unique, non-reproducible historic event and no free alternatives are known to exist or can be created, as the train is no longer in operation.

The first streamlined, non-articulated diesel locomotive, General Motors EMD model EA-EB #51, on the Baltimore and Ohio Railroad's Royal Blue in 1937. This was GM's first production model diesel locomotive. The southbound New York-Washington DC train is pictured on the lower level track at Camden Station in Baltimore, Maryland

Photo by R. L. Wilcox, reprinted in Royal Blue Line by Herbert H. Harwood, Jr. ( ISBN  0-89778-155-4).
© Bruce C. Greenberg, 1990

Camden Station

cropped by User:JGHowes

Yes

It is believed that this low-resolution version depicting a unique historic event — the first streamlined, non-articulated diesel locomotive in service on the B&O's Royal Blue — is permissible Fair Use solely for the Wikipedia article about the Royal Blue at Camden Station because:

1. it portrays a historically significant event, i.e., the beginning of the dieselization of the world's railroads;
2. the image illustrates the B&O's use of the Camden Station lower level tracks for passenger trains in the 1897–1961 era far better than mere prose alone;
3. as a greatly reduced, low-resolution version, this image is non-reproducible for commercial purposes.
4. use of this low-resolution version does not diminish the value of the original media to the copyright holder nor interfere with the media's original purpose, nor will it dilute the importance or recognition of this image in connection with the copyright-holder.
5. it meets all criteria in WP:NFCC.

Not replaceable. It is a unique, non-reproducible historic event and no free alternatives are known to exist or can be created, as the train and lower level rail passenger service at Camden Station are no longer in operation.