Larry W4CSC wrote:
Does it look like a little silver bullet with axial leads and one end
is plugged with a white ceramic something?

No, it looks like a light aluminum housing seated on a plastic plug with
two leads coming out. The aluminum case is open on top and there a metal
plate floating around inside the open top. If depressed it's kind of like a
clicker, i.e. it's convex to the opening. Any idea?