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This is an ancient Roman gold aureus of emperor Vespasian, minted at Rome in late 73 AD
Obverse: IMP CAES VESP AVG CEN, "Supreme commander (Imperator) Caesar Vespasian, emperor (Augustus), censor." laureate head right.
Reverse: PAX AVG, "Peace of the emperor (Augustus)" Pax standing left, leaning on column, holding branch, caduceus; before her is a money sack (bag of coins) on a tripod.
One of the 12 Caesars Aurei
DATE: 69 - 79 AD (This coin was minted at Rome in late 73 AD)
SIZE: 20mm dia
WEIGHT: 7.11 grams
ATTRIBUTION: BMC 95; Calico 659; RIC 512; Cohen 297.
PROVENANCE: Private collection. Bremen, Germany.