This massive gold coin weighing approximately 27.7-8 grams was known as an octadrachm (equivalent in worth to 8 drachmae). Under the Ptolemies, mints in cities like Alexandria and Ptolemais produced ever larger denominations in gold, silver and bronze. This coin was minted in Alexandria, Egypt between 260-40 BCE. On its obverse it bears the diademed heads of Ptolemy II and Arsinöe II with the legend "Adelphon" (literally Greek for "Siblings"). On the reverse, Ptolemy I and Berenike I are depicted. (British Museum, London)
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