Help ID And Value This Button.

[catfishjim90]

I found this button at a pre civil war house. In the city of St.Charles Missouri
is this a Missouri 5th infantry Regiment button? If so is it rare? Thank you for your time. Catfishjim

 

[fyrffytr1]

Pretty sure that is a collar disk. I can't tell from your picture if it has a plain or stippled background. It would probably date from about 1924 -1937. Let's see a picture of the backside, please. The attachment type will also help date it.

 

[duggap]

Dating Metallic Insignia Collar Disks

Check out this site, it will help you date your item.