Both palaeography and orthography seem to be consistent with a 1st century BC dating, probably around 50 BC
between 356 and 349 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
360-330 BC (Keil 1911, 52)
around or before 500 BC
after 359 BC
320-310 BC (see the commentary)