Egypt. Alexandria. Hadrian, 117-138. Tetradrachm (Billon, 24.48 mm, 12.26 g). Dated RY 2 (= 117/8). ΑΥΤ ΚΑΙϹ ΤΡAΑΝΟϹ ΑΔΡΙΑΝΟϹ CЄ Laureate head of Hadrian to right, with slight drapery on his left shoulder. Rev. Harpokrates standing left, raising his right hand to his mouth and holding cornucopiae in his left; L B (date) in lower left field. Dattari-Savio 1375 (this coin). RPC III, 4996 (this coin cited). Emmett 850. Cf. Savio, Tetradrammi alessandrini, pp.77-81. Apparently the third known example. Toned. Slightly rough, otherwise, Very Fine. Extremely Rare. Ex Giovanni Dattari Collection 1375. Ex Naville Numismatics Ltd.40, 27.05.2018, lot 374. Important tetradrachm already belonging to the Dattari collection, apparently to the first issues of Hadrian with his youthful portrait. On reverse is Harpokrates (Horus as child) the deity born of the mystical marriage between Isis and Osiris with whom he forms the Alexandrian triad. His cult in Egypt was practised in addition to Alexandria, especially in Herakleopolis Magna, in Edfu (Apollinopolis), in Mendes, in Pelusium, in Kanopos and in Taua-Buto (cf. Poole, pp. LXIII-LXVI).