Unpublished Reverse Type for RY 3 of Julia Mamaea?

359, Lot: 246. Estimate $200. Sold for $380. This amount does not include the buyer’s fee.

EGYPT, Alexandria. Julia Mamaea. Augusta, AD 222-235. Potin Tetradrachm (24mm, 12.53 g, 12h). Dated RY 3 of Severus Alexander (AD 223/4). Draped bust right / Draped bust of Serapis right, wearing ornate calathus; L Γ (date) across field. Köln –; Dattari –; K&G –; Emmett 3224.3 (not listed for this date; years 4 & 5 are R5). VF, dark gray-brown surfaces. Extremely rare type for this year.

From the Hermanubis Collection.