Unknown horn?

[4J25]

I picked this up from a flea market a while back, don't know exactly what it is and the I.D. plate is unreadable. Hope you guys can help me out:

[Daniel]

That is a 1940's-50's vibratory horn with a built-in screen. I believe that most of these were made by Benjamin, and many were labeled IBM or Edwards. Make sure of the voltage before plugging it in, since many of these are low-voltage horns rated at somewhere between 6 and 24VAC, though there are 120VAC models. These were popular as school "bells" in many school buildings built after WWII, particularly in Oregon (where most older schools also used Model A-style sirens as fire/air raid alarms). My old elementary school used this model for the outside bells.

[4J25]

Ok, thanks!

[3t22]

Looks lie a Faraday Type 2. As Daniel said originally manufactured by Benjamin electric in the 1930's, and were also re-labled by IBM as their 4030-1. If you can, take a pic of the tag, if the numbers are still visible we can probably determine voltage.