Any further info on this tombac button? Any way to know if it is Revolutionary war?

[Recoveredmol]

Found this tombac button as a site where ive found several items that date to the late 1700s/early 1800s.

My whites metal detector registers a 71 on it indicating copper. And it looks it has a silver trim piece on it.

Does anyone have any more information on it?

Thanks.

 

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[Recoveredmol]

Added two new photos with better lighting