Dual horns - Wiring

[41Joe]

I bought these horns at a anitque shop. I don't think they are Ford, but they look like what is supposed to be stock on my 41. I need help with the wiring and operation of these. My one big question is how they are supposed to work. There are contactors that look like points in a way. Is there supposed to be a gap between them? Is the metal holding the points spring or is it the kind that bends when it gets hot? I tried attaching pictures, but it wasn't working.