I got asked this question:

I am a model railroad hobbyist, and I am looking for information on the ceramic insulators used on the old triangle catenary on the New Haven railroad. I find myself in need of your expertise.

I've attached the best picture I could find (and believe me, I've looked) of the insulators in question. They're the ones at an angle on the steel catenary bridge, attached to the two curving messenger wires.

Can you identify these, or at least point me to a picture of something very similar? I'm trying to get some accurate plastic miniatures made, but I need a good prototype to work from. Any help is appreciated.

I circled one in red. I don't know if this is even a standard U/M numbered porcelain insulator. Any clues?