Ancient Roman Imperial Coins - Galla Placidia - Cross Nummus. 425-430 AD Wife of Constantius III, Rome mint. Obv: D N GALLA PLACIDIA P F AVG legend with diademed and draped bust right. Rev: SALVS REPVBLICE legend with cross; ? in left field, mintmark RM below. RIC x, 2111-2114; LRBC II, 844; Sear 21359. 1.06 grams. ("). Good very fine. Rare.