Egypt. Alexandria. Antoninus Pius, 138-161. Drachm (Bronze, 34.20 mm, 23.66 g). Dated RY 2 = AD 138/9. [AYT K T AIΛ AΔP] ANTωNINOC ЄYC CЄB Bare-headed bust right, drapery on left shoulder. Rev. Serapis seated left holding sceptre; at his feet, Cerberus; to left, Demeter standing right, holding torch; to right Tyche holding rudder and cornucopia; all wearing kalathos, all on galley with oars; L B (date) in upper field. RPC IV, 4.54.3 (this specimen illustrated). Dattari-Savio Plate 148, 2859 (this coin). Dattari 2859 and Plate XXIII (this coin illustrated). Emmett 1672 (this coin illustrated at pa. 74C). Attractive brown tone. Exceptional quality. About Extremely Fine. Rare. From the Dattari Collection. Illustrated in Dattari. Ex Naville Numismatics Ltd., Auction 48, 07.04.2019, lot 263. Splendid and rare drachm issued in the fateful Sothic year 138 - 139 AD corresponding to the second year of Antoninus Pius’ Egyptian reign. On the obverse, a masterful nude bust of the emperor, engraved by a great artist who was probably also the author of the complex and sharp scene on the reverse. Here aboard a monumental trireme sailing left, is depicted a dominant "Alexandrian triad": in the centre Zeus Serapis enthroned, in front Demeter to the left and Tyche of Alexandria on the right. A museum-worthy specimen, specially chosen and illustrated by Giovanni Dattari for his renowned collection.