Help with button

[sonofadigger]

I found this old looking button this past summer and haven't been able to identify it maybe one of you guys can help

 

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[nhbenz]

I believe its an Artillery collar disc with the fastener missing. Scroll down to Type 5 (V) here: Dating Metallic Insignia: Collar Disks
I'm uncertain about the dimple above the crossed cannons... Don't know if a particular state or company letter(s) might have been attached there?

 

[sonofadigger]

It's pretty similar but yeah still not perfect match

 

[releventchair]

U.S. Army Ordnance Corps buttons? Yours seems to have been a two piece. Based on a French design.
U.S. had a lined field that is not seen in your pic..

Ridgeway Civil War Archive Buttons from Federal Ordnance

 

[nhbenz]

That's a better answer!

 

[sonofadigger]

Thanks fellas for the awesome answers