16th Regiment or militia plate? Other?

[TomPA]

Any ideas on this 2" long, brass, lead filled plate? It was found at house foundation
site in western PA.

 

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[DoranHashemi]

The number styling looks 19th century

 

[Bryanhashemi]

might be a lead filled rosette

 

[Steve in PA]

That is an interesting piece, but I have never seen any US military or militia plates like that. Possibly European as I have seen some late 19th / early 20th century European military buttons with similar regimental markings.