scovill button

My son found this button while digging a French drain in western NJ. Scovill button, maybe 1880s. Used on what kind of uniform, please?

Hi, I get the sense there tends to be lots of button inquiries. ;^) I hope you don't mind one! I found this in a $1 grab bag of broken/misc jewelry bits. Initial searching found lots of Scovill information - most pertaining to their Civil War uniform buttons. I messaged the Scovill company and...