Gallienus, billon tetradrachm of Alexandria, Egypt. Dated Year 10, sole reign, AD 262-263. 9.93 g.

AVT K P LIC GALLIHNOC CEB, laureate, draped and cuirassed bust right. 
DEKAETHRIC KV PIOV ("Decennalia of the Emperor") legend in four lines within wreath. Year LI below.

Milne 4081; Emmett 3840; Dattari 5273.

With permission of Münzen & Medaillen (DE) auction 42, Lot 250, June 2015.