Yes, I did see at least one other post you made at another site while searching as I did an image search. The image search did turn up quite a few similarities, but as I stated above yours seems to be a loose mishmash of many styles, manufacturers, and eras.
Shiloh may be a big help as they are a dealer in the general area (I think?) where it was found so chances are that they have seen it before as long as it isn't unique or extremely rare. The museum on the other hand I can only guess at their response. They may not respond at all to inquiries, or they may even want to have it in hand to try and research and document it. I have heard from many detectorists that museum curators helped them ID finds, while my local museum won't even acknowledge receiving an E-mail or take any calls.
As for the button having a tin back, that's unusual at best. I haven't seen tin backs until well after the CW era when manufacturers started looking to cheapen up costs. But the real oddity is the tin back and brass eyelet. That's a real head scratcher! Seems the metal work is top notch while the art work itself much less to. But what really bothers me are the upside down arrows again making me lean towards being confederate.