Badge? Rev war

[Smilodon]

Just got this and it is so encrusted with material. That day a pewter 15th regiment pewter infantry button, re war Light artillery button, eagle button, bunch of buckles and flat buttons. I was hoping it was some type of military item but could not find anything this size and with the four prongs on the back. It is about 2-3/4" long and is pretty heavy. I am hoping there is some on it but cant tell until I can get it cleaned, anyone know what this is?

 

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[DCMatt]

Check this link:

Blinker or Saddle Brass - UK Finds Database -

DCMatt