Greek magical papyri
I’m researching PGM XII.270–350, usually titled “A Little Ring for Success and Favor and Victory” in The Greek Magical Papyri in Translation edited by Hans Dieter Betz.
The ritual says to engrave Helios on a heliotrope/bloodstone, with an Ouroboros and a sacred scarab, and then says:
“On the reverse side of the stone you are to inscribe the name in hieroglyphics, as the prophets pronounce [it].”
However, in the English translation I have, the actual hieroglyphic name does not appear to be reproduced.
Later in the same ritual, the practitioner invokes the “Greatest god” using a long series of divine names beginning with IAO SABAOTH ADONAI, and still later the text says:
“Whenever you wish to command the god, give your command, saying the greatest name OUPHOR.”
It also calls OUPHOR “the holy, true OUPHOR” and says this was the god/name used by Urbicus.
My question is:
Do scholars know what specific divine name or hieroglyphic inscription was supposed to be engraved on the reverse of the stone in PGM XII.270–350?
In particular:
Is the missing name preserved in the original papyrus or in a critical Greek/Demotic edition?
Is the intended name believed to be OUPHOR, IAO, IAO SABAOTH, or something else?
Were actual Egyptian hieroglyphs present in the manuscript but omitted from the Betz English translation?
Is there a photograph, facsimile, diplomatic transcription, Preisendanz edition, or scholarly commentary that shows the original signs?
Do scholars identify who the “Greatest god” or “god” being commanded in this particular ritual is?
I’m interested in the historical/textual reconstruction, not instructions for performing the ritual. If anyone can point me to the manuscript, papyrus line numbers, scholarly edition, article, or commentary discussing this passage, I’d appreciate it.