HELP! Military Button ID Please

[MarkNYC]

I have gone through multiple web pages that show all the markings on the back and I cannot find this anywhere.

It's a flat-faced brass button with, what I believe is, "SURFACE FINE PLATE" on the backside.

Can anyone tell me what this is?

I have a dozen or so from my 103yo grandmother's button collection that are all from this period.

Thanks!

 

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[vpnavy]

I searched

and found something similar...

Good day today* 1867 2-cent, button, & lead (Feb 09, 2011, 09:39 PM)

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[MarkNYC]

THANK YOU!

 

[A2coins]

Good Id