I don't recall seeing this before. (but as most of you know, my memory is pretty bad)
"Los Angeles Railway (LARy) Garvanza Substation, 5000 Buchanan Street, near Highland Park, 1920"
https://www.flickr.com/photos/metrol...ive/2951183102
As far as I can tell, this is the only image of it on the internet.
__