This is a convex 2 piece brass Confederate Script I Infantry coat button. The reverse is missing it's loop. Makers marks is very lightly seen on the back - S. Isaacs Campbell & Co. London 71 Jermyn St.
Measures 7/8" in diameter
More info/or to purchase go to the following link ~
https://governorsantiques.com/products/civil-war-confederate-script-i-infantry-coat-button-gs01036?utm_source=copyToPasteBoard&utm_medium=product-links&utm_content=web
Governor’s Architectural Salvage
8000 Antique Lane
Mechanicsville, VA 23116 show contact info
www.governorsantiques.com