@trainroomgary I think that's a solid analysis as long as the locomotive wasn't parked. I actually didn't know film photos were edited in the dark room though! I got to use a dark room once and it was the coolest thing. The method you describe is interesting.
But @cbojanower did say this was discovered in some family items his neighbor had. Makes you wonder if someone in that family was an avid photographer with a great sense of humor haha