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'Caps of the Dioscuri' series. AE As, c. 169-158 BC. Obv. Laureate head of Janus; above, mark of value I. Rev. Prow right; above, caps of the Dioscuri and before mark of value. Below, ROMA. Cr. 181/1. 31.91 g. 32.50 mm. R. Rare. Uneven green patina, with reddish brown spots on reverse. Minor area of flatness on obverse, otherwise. VF.