Button and whatsit

[FingerGrime]

The end of the whatsit looks like a skeleton key, and to me it looks like it is bent intentionally.
The end of the "key" (opposite of the skeleton key-like head) looks as though it has broken off of something. It is also a bit raised near that end.
The button is probably the coolest one I have ever found. It reads Erin Go Bragh, meaning Ireland forever. The rest of the backmark reads E & B and "rich treble standard". At least I think it says treble standard.
There is no design on the other side of the button. It is the exactly the size of a cent.
I spent quite a long time trying to learn more about the button, but I couldn't seem to find anything. Any help identifying these things would be greatly appreciated.

 

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[lostcauses]

I agree with the key. May have been modified for some other use.
The button folks should be along to tell you about that.

Nice finds.

 

[FingerGrime]

Any ideas on the button. I figured it is probably from 1870-1890.

 

[Produce Guy]

Is the key hollow at the end?

 

[FingerGrime]

Nope. It is solid at the end.

 

[chrisplay2004]

Your key reminds me of a bottle opener...
However, in pic 2 you can clearly see it is a broken key
No idea on your button.

 

[FingerGrime]

Thanks!