✅ SOLVED U.S. Military horse tack?

[toasted]

My first thought when I dug it was rosette or some sort of military piece being it has U.S. on it. But the back is weird

 

[Mud Hut]

I am pretty sure that that piece is the top to a flame spreader of an old lamp.

 

[Mud Hut]

Hey ..I just searched my theory .. Check this out! Look at all the pics.. one shows the underside with the tabs: Antique Brass RARE "The Trenton" Improved Flame Spreader Clark Brothers | eBay

 

[toasted]

Hey ..I just searched my theory .. Check this out! Look at all the pics.. one shows the underside with the tabs: Antique Brass RARE "The Trenton" Improved Flame Spreader Clark Brothers | eBay

Looks like one to me too. Thanks