Not sure what this is, found under hood of a 64 imperial LeBaron, I’m thinking either external electric fan or siren? Have to drill it out as the tiny bolt is stripped.
Gotta be a horn, siren or something? A fan maybe? Tho that would be odd. Boats have blowers to blow fumes out so they don't build up and explode. Never heard of one on a car tho. Looks like Elvis Presleys microphone, lol.
Yeah. looks like an old Federal Signal brand siren. Like caseywheels said, those things scream wired 12v.