morse code tapper?

[Viddy]

I found this outside an old barn near an Indiana, PA park. It's approximately 1 1/4" x 3". It looks like one of those things that you used to tap morse code on or something (?). Something off an old phone system? It looks like it's from an old electronic something or other.

any ideas?

 

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[PYRATE]

part of a distributor rotor??

 

[ABruce]

part of a distributor rotor??

Man, that would be at least a 7" diameter distributor cap!
I can tell you that it's NOT part of a telegraph key.

 

[Viddy]

definately looks like something electronic though....