I was going through some buttons I'd found recently at some Indian War sites and noticed this one was different. It's two piece, cuff button size, and has an eagle and stars so I feel like it's a military button, but not one I've run across before. The eagle is facing to its left. There's a ring of small stars around the eagle. The rim has texture and almost looks like a rope pattern. The back is rusty and seems to be of iron rather than brass. There's no makers information that I can see. Anyone know what it is?