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
350
367/6 BC (see l. 1 ἐπὶ Πολυζήλο ἄρχοντος)
Both palaeography and orthography seem to be consistent with a 1st century BC dating, probably around 50 BC