The liturgical scholar Paul F. Bradshaw suggests that this anaphora reached its final form in the 4th century, adding the Sanctus, as well as the Epiclesis and the Institution narrative, to a more ancient material, which could more likely derive from West Syria rather than from Egypt.
the John Rylands parchment 465, written in Greek in the 6th century and badly conserved, includes the text from the first epiclesis up to the end of the anaphora.