I used to see these all the time when i was a kid in the early 90's in the town of South Hadley MA. They Upgraded the poles in the Mid 90's and they were all replaced with T&B 113's.
Yes, some of the T&B 113's are still there to this day but most have been changed to Durastars. I like the two door unistyles. It's to bad they are not around anymore.
I only know of a few of Unistyle 175s. Odd how none of them have their origional glass lenses but the even older OV-10 and other 60's lights do have what looks liek the origional glass. Were the unistyle refractors brittle or something?
Not that I am aware of, alot of the 175's here still have there original glass lens. I believe the two door unistyles have the same lens as the single door 400.
Maybe the ones used here origionally came with polycarbonate lenses that were changed out over time.... i've only seen one LM 175 out of the 3 to 5 that I've seen with it's origional glass.