Unique Marcus Aurelius Tetradrachm?

CNG 111, Lot: 585. Estimate $300. Sold for $380. This amount does not include the buyer’s fee.

EGYPT, Alexandria. Marcus Aurelius. AD 161-180. BI Tetradrachm (21.5mm, 11.24 g, 12h). Dated RY 7 (AD 166/167). Μ AVΡΗΛ[IOC] ΑΝΤΩΝΙΝΟC C, laureate bust left, slight drapery / L ЄB∆/OMOY (date) in two lines within laurel wreath. Köln –; Dattari (Savio) –; K&G –; RPC IV Online –; Emmett –. VF, toned, a few tiny spots of verdigris. Extremely rare, if not unique. None in CoinArchives.

This reverse type, with the regnal year spelled out (ЄB∆OMOY = 7), is known only for Lucius Verus (Emmett 2366.7 [R5], where he cited the Demetrio 2236 specimen, and Dattari also owned the type for Verus–no. 9432). The only parallel for Marcus Aurelius is the usual type with the date as L Z within a laurel wreath (cf. K&G 37.303-5).