Oooooh, nice. I don't think I've ever seen a photo of a real Fedelcode before. Often it'll say "Fedelcode" on the housing, but won't actually have a damper.
I think I read somewhere that they used these for morse code back in the day. That would be something to hear.
Is that particular building part of the museum? I live 20mins west of SLC and I would love to take a trip of there and see all of the siren/fire alarm related equipment you have on display.
And also, does this happen to have a test schedule? I would love to hear it go off.