Egypt. Alexandria. Antoninus Pius, 138-161. Hemidrachm (Bronze, 29.21 mm, 11.68 g). Dated RY 2 (= 138/9). [ΑΥΤ Κ Τ ΑΙ] ΑΔΡ ΑΝΤ[ωΝΙΝΟϹ ΕΥϹΕΒ] Radiate head wearing aegis right. Rev. Demeter, veiled, seated left, holding patera and torch, at feet left lighted altar; [L] B (date) in left field. Geissen -. Dattari-Savio 2509 (this coin) & 8377. RPC IV.4, 117.2 (this coin cited). Staffieri 32b. Emmett 1716. Good Fine. Rare. Ex Giovanni Dattari Collection, 2509, Il Cairo. Ex Naville Numismatics Ltd. 67, 01.08.2021, lot 211. This hemidrachm, as the next two (nos. 148 and 149 of the collection), all extremely rare, belong to the distinctive and exceptional, Alexandrian imperial bronze series illustrated by STAFFIERI G. M. in the homonymous essay with catalogue raisonné published in "Quaderni Ticinesi di Numismatica e Antichità Classiche" XLIII, 2013, pp. 121-144 and in abstract. Hence the reference of this coin to no. 32 b of the catalogue, deriving from the renowned Dattari collection, one of only three specimens surveyed by RPC IV.4.