3" vintage horn cap or cantle concho with prongs on the back, raised rope edge with 4 leaf clover. Unmarked but I'd venture a guess for it to be stainless or nickle silver. I've marked this as used, it does not appear to ever have been mounted onto a saddle, but could stand to be polished as there is dust from storage. Would make a nice addition to a ranch saddle or parade saddle, or breast collar. 

Thanks for looking!