Connecticut Button, Connecticut National Guard, Officer Staff, Scovill Mfg Co Waterbury, dm between rings, (22.3mm) Button depicts script "CNG", Connecticut National Guard on lined field . This unit was organized during the war, representing a replacement of state militia units, intended for officers. Backmark: "SCOVILL MF'G CO, / WATERBURY." dm between two rings of dots, ca 1860's. Three part officer staff button, coat size, high convex.
Reference: Albert CT20A, Tice CT210A1