Gratian AD 367-383, AE2 of Alexandria, 5.75g, 19 mm.

DN GRATIANVS PF AVG, Helmeted and pearl-diademed, draped and cuirassed bust right, holding spear and shield.
GLORAI ROMANORVM (sic, error of GLORIA ROMANORVM), Emperor 
standing front on galley, looking right, right hand raised. Victory seated at the helm.

Wreath in left field.
Mintmark ALEA.

RIC IX Alexandria 6a var (engraver's error).

With permission of Harlan J. Berk Buy or Bid Sale 194, Lot 255, July 2015.

Note: This error was apparently copied from one erroneous 
die to several others for this Alexandrian reverse type.
It is known on issues of Theodosius I, Gratian and Arcadius.