FDNY fire alarm system 1927

FDNY fire alarm system, silent film from about 1927 showing the central office and operation of the system. Extracted from the original silent fil on the Prelenger archives.
A full version is available there, a copy of it is elsewhere on youtube but someone added sound effects, and at one point the sound is so loud it actually warns you to turn your volume down- about 3 seconds before the sound levels almost take your speakers off the wall.
I decided to extract this portion of interest and eliminate the stupid, badly done sound effects, I did add music however.
I have a small section on my forum that is for information on the correct way to restore antique fire alarm boxes. I see too many people taking these antiques, stripping the original paint by sandblasting, repainting them with super high-gloss auto enamel or powder coatings, adding on fake eagle toppers, pinstriping and decals, polishing brass that was originally meant to be painted, replacing missing glass with cheap plastic and calling that a "restoration."
I promote more of a museum style conservation/restoration of these antiques:
midlandterracot...
I also started a G+ group plus.google.co...