Found this guy today, mounted on a wall in a basement of a building in Center City Philadelphia. Just had to rescue him for my collection. Not sure if it was used for an old fire alarm or not, it was mounted above a bunch of old abandoned electrical panels. So may have been an old boiler alarm or part of a paging system. Still interesting!
Old Autocall T bell - not sure of the voltage, but all it says on the nameplate is “AC SERIES”.
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