Constantius II, AE20 of Alexandria, AD 348-351.

D N CONSTAN-TIVS P F AVG, pearl-diademed, draped and cuirassed bust left, holding globe.
FEL TEMP REPARATIO, emperor standing left, holding labarum and resting hand on grounded shield behind, two kneeling captives before him.

Star in left field.
Mintmark ALE Gamma. 

RIC VIII Alexandria 62; LRBC 2822.

With permission of Leu Numismatik AG - Web Auction 1, Lot 1362, June 2017.