Antoninus Pius Billon Tetradrachm, Year 23 (159-160 AD), Alexandria, Egypt Mint. Obv. Laureate bust right wearing cuirass and paladumentum, ΑΝΤѠΝΙΝΟϹ - ϹƐΒ ƐVϹƐΒ (counterclockwise from upper right) / Isis crowned with disk, horns, and plumes, seated right offering her right breast to crowned Harpokrates [infant Horus] seated on her lap; Harpokrates extends his right hand towards her and holds lotus flower in left hand; crowned falcon [Horus] perches right on left end of back of throne, L - Γ [G] /K [= Year 23] across field. Emmett 1402.23; Milne 2403; Dattari (Savio) 2257; RPC IV.4 Online, 13938 (temporary) (see https://rpc.ashmus.ox.ac.uk/coins/4/13938); Köln (Geissen) 1842 [same dies, see RPC Online 13938 at the link provided, Example 3]. 21x28 mm., 11.67 g. Ex. Harlan J. Berk, Ltd., 168th Buy or Bid Sale, March 16, 2010, Lot 475 [with ticket]. Year 23 was the final year of Antoninus Pius's reign. According to Emmett, it was the only year in which this reverse type was minted for Antoninus Pius as an Alexandrian tetradrachm. (There are several varieties of this type, with the differences all on the obverse -- see RPC IV.4 online, 13936-13937, 14355-14356 -- and the same theme was presented on some bronze drachms earlier in Antoninus Pius's reign.) Emmett classifies the 1402.23 type as common; however, I was only able to find three examples of any of the varieties of this type on acsearch, and I haven't been able to find any CT posts about it. In any event, I think it's an interesting type. I particularly like the fact that Horus appears twice on the same coin in different manifestations -- once as an infant, and once as a falcon. It is, of course, quite similar in theme to my Julia Domna denarius with Isis nursing infant Horus on the reverse (RIC IV-1 577, RSC III 174, Sear RCV II 6606). No falcon on that one, though! Does anyone know when this theme was first portrayed, either on Imperial coins or on Alexandrian or other Provincial coins? Please post your own examples of this theme.