i can see where you think you see cs but thats not a buckle. The shape is way off to be
CoilyGirl, since you think you don't have a copy of the Mullinax book on Confederate buckles & plates, go here and scroll down to the next-to-last buckle (one of the iron sheetmetal "Breckinridge" oval CS buckles): The Ridgeway Civil War collection Buckles issued by the Confederate government Oval belt buckles, Breckinridge