Incredible film for learning about old time steam locomotives! There is a lot of footage of them being operated. It all appears to be shot on actual RR tracks, but most of the insulator shots are too far away to tell what they are.

That is not Buster up the pole.

The "insulator" appears to be either a movie prop...or maybe not? The bottom of the back skirt appears to be missing/broken? Possible CD 126 broken off?