Egypt. Alexandria. Julia Mamaea, mother of Severus Alexander, 222-235. Tetradrachm (Billon, 23.7 mm, 11.88 g). Dated RY 13 of Severus Alexander (= 233/4). ΙΟΥ ΜΑΜΑΙΑ ϹΕΒ ΜΗΤΕ ϹΕΒ Κ ϹΤ[ΡΑ] Draped bust right, wearing stephane. Rev. Turreted bust of Alexandria right; palm branch in left field; L IΓ (date) in left field. Dattari -Savio pl. 240, 10022 (this coin). RPC Online, 10621.9 (this coin). Emmett 3189. Attractive old cabinet tone. Nearly Extremely Fine. Ex Giovanni Dattari Collection DS 10022. Ex Naville Numismatics Ltd. 44, 04.11.2018, lot 338. This tetradrachm too, of Julia Mamaea and of celebrated provenance, great rarity and excellent preservation, shows, on the obverse, a noble portrait of the empress mother, while on the reverse, appears the bust of the personification of Alexandria with the turreted headdress and the augural palm branch in front.