Can someone help me ID and date this flat button?

[JimK]

Hello All,
I found this flat button last weekend. It is between the size of a dime and penny (give or take). It was found in the area of a Civil War camp, but was wondering if it was older, war period or maybe post war. There are no markings front or back.
Thanks for the help.

JimK

 

[Marylanddetctr]

Probably civil war or earlier but I can't say for sure

 

[JimK]

Thank you so much for the reply. I know there was not much to go on in the pictures.

JimK

 

[Marylanddetctr]

Sure thing

 

[GatorBoy]

 

[JimK]

Thanks so much for that chart. It will help me alot.

JimK

 

[GatorBoy]

No problem it's very general and there are some inconsistencies but it'll give you a good idea