338-325 BC (age of Lykourgos)
issued in the seventh year of the kingdom of Ptolemy (i.e. Ptolemy III) son of Ptolemy (II) and Arsinoe (240 BC), on the second day of the month Dystros (February: Dittenberger et alii; May-June: Sherk), under the priesthood of Theodotos
1st century BC-1st century AD
Both palaeography and orthography seem to be consistent with a 1st century BC dating, probably around 50 BC