Beautiful pics! The poles might be close to 90 years old, but I don't think the fixtures are that old because they have 40s-60s heads.

Not sre if the poles are that old, they seem to be made out of bunch of RMC.....Ridgid metalical conduits.....so they may be same age as the heads....I think they date to the 50s....not 40s because the chain holder hole is a cast instead of a eye screw