Egypt. Alexandria. Severus Alexander and Iulia Mamaea, 222-235. Tetradrachm (Billon, 24.5 mm, 14.60 g) dated RY 4 (= 224-225) Α ΚΑΙ Μ ΑΥΡ ϹЄΟΥΗΡ ΑΛЄΞΑΝΔΡΟϹ ЄΥϹЄΒ Laureate, draped and cuirassed bust of Severus Alexander right. Rev. L ΤЄΤΑΡΤ (date) in semicircle to left, ΜΑΜЄΑ ϹЄΒ in semicircle to right. Draped bust of Iulia Mamaea right, wearing stephane. RPC VI, 10293 (temporary). Dattari-Savio 4251. Milne 2943a. Geissen 2424. Emmett 3113. BMC 1715f. Vogt II, 127. Cf. SAVIO A., Tetradrammi alessandrini, pp. 121-126. Slightly rough/porous surface. Nice tone. Good Very Fine. Ex Carlo Fontana Collection. Ex Finarte 1996, lot 1137. Ex Lanz Numismatik 154, 11-12.06.2012, lot 414. Tetradrachm of large size belonging to the famous Roman-Alexandrian series minted exclusively in its 4th (224-225 AD) and 7th years ( 226-227 AD), in Alexandria by roman engravers or in Rome always by roman engravers: the matter is still open but it were issued coins of exceptional style and easily recognisable since they are very different from those tipically Egyptian -Alexandrian. In this excellent specimen we admire on the obverse the laureate bust of Alexander Severus and on the reverse, the draped one of his mother Julia Mamaea. See STAFFIERI, G. M., Alexandria in Nummis, Nr. 201-203, pp 401-406.