Cast brass plate with integral eagle motif and tongue with wreath ending above the wing. The quality of the motif indicated a follow-up strike in a metal die, or it was cast in a plaster or metal mold. No bench number. Early-war enlisted plate contracted by the ordinance department (or a state) measurably larger than the 1861 regulation width.
“American Military Belt Plates” by Michael J. O'Donnell & Duncan Campbell, Pg. 387, Plate #638.