I’ve always admired the contours of Alco’s Century-Series diesels.

We arrived at Steamtown in Scranton, Pa., as the sun was on the western horizon—late sun on November day. A set of Delaware-Lackawanna’s antique Big Alcos were catching the rays near Bridge 60.

In the mid-2000s, I traveled on some of these iconic diesels as part my research for various book projects. Those photos were all exposed on color slide film. By contrast the images presented here were all made digitally using my Nikon Z7-II. (However, for the sake of continuity I also exposed a few Ektachrome slides here.)

D-L C-636 No. 3642 was originally a Penn-Central unit, and later served as Conrail 6792. In the mid-1980s, I recall seeing Conrail C-636s among hundreds locomotives stored in the Selkirk, New York deadlines. I’ll need to go back to my black & white negatives and see if 3642 (nee 6792) was among the locomotives I photographed there.

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