375-350 BC, as stated by Dubois
late 3rd century – early 2nd century BC
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
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
426/5 BC
374/3 BC
446/5 BC