I have stated before that I always like the actual workers and teh SW1500 by EMD is right there among the best. I recall Dad and brother would curl their lips and snarl “Just a Crud” and begrudgingly they would snap a photo.
Perhaps I felt sorry for these workhorses and they do remind me of the good times in rail yards all over the US. These images are also not location marked but I believe they are in the SF Bay Area from October of 1975
This link : https://www.thedieselshop.us/Data%20EMD%20SW1500.HTML has a nice detailed spec sheet of these common hybrids and it helps to realize their minimal configuration for yard duties.
Here’s to the Cruds =clink=
Fred's Slides 