Egypt, Alexandria. Severus Alexander 222-235. Tetradrachm (Billon, 23.08 mm, 13.08 g). Dated RY 7 = AD 227/8. Α ΚΑΙ Μ ΑYΡ СЄOYHP ΑΛΕΞΑΝΔPOC ЄYCЄB Laureate and cuirassed youthful bust right. Rev. Hippopotamus advancing right; L Z (date) in field. Dattari-Savio Plate 237, 4416 (this coin). RPC online 10367.14 (this coin). Emmett 3109. Nice old cabinet tone. Good Very Fine. From the Dattari Collection. Ex Naville Numismatics Ltd., Auction 41, 26.06.2018, lot 367. Very special and rare tetradrachm by Severus Alexander still showing a youthful portrait but now out of adolescence. But it is in reverse that we find the unusual image of a gigantic hippopotamus (which the Germans aptly call "Nile horse"), well-proportioned in realistic opulent forms and equipped with a vivacity that makes it dynamic and agile with its massive and muscular mass. The engraver of the coin has been able to admirably represent the walking of this imposing Nilotic mammal and sacred to the Nilus as a river deity. Splendid specimen from the Giovanni Dattari collection.