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This is an ancient Roman Æ (orichalcum) sestertius of empress Faustina II, minted in Rome between 161 - 175 AD
Obverse: FAVSTINA AVGVSTA, "Faustina Empress" Bust of Faustina II, draped
Reverse: MATRI MAGNAE / S C, "To the great mother / Decree of the senate" Cybele, holding drum, seated right between two lions, SC in ex.
A wonderful example with a good portrait and nice patina.
DATE: 161 - 175 AD
SIZE: 30mm dia
WEIGHT: 21.95 grams
ATTRIBUTION: (RCV 2000 Edition) Number 5281, RIC 1663, Cohen 169, BMC 932
PROVENANCE: Formerly in a private collection, Bremen. Germany.