I found this video on Youtube today. It's interesting, both for the pictures of the locomotives themselves, plus lots of trackside wires. And the sound is quite good, too. It even includes a movie made by GE in 1938 showing their first developmental turbine locomotive (which was a steam turbine, believe it or not!).
I'm putting this here, even though I also posted it to the Digest, so that it can be found later if there is further interest.