Julia Mamaea, AE Tetradrachm of Alexandria, AD 222-235. 23 mm, 12.42 g. Dated year 13 = AD 233-234.

Diademed and draped bust right.
Date LIG to left of draped bust of Isis right, upright palm branch in right field. 

Milne 3154; Köln 2538; Dattari 4496 (this coin); Emmett 3211. 
Ex Dattari Collection (Harmer Rooke sale, lot 641 (part), May 1971.

With permission of cngcoins.com, auction 113, Lot 198, May 2005.