Theodosius I, Antioch, 3. Officina, 378-383 AD., AE 18mm; 2.9g. 

DN THEODO-SIVS PF AVG, rosette-diademed, draped, cuirassed bust right.
CONCOR-DIA AVGGG, Constantinopolis seated facing, turret on head, looking half right, holding sceptre, left hand on knee

theta-phi across fields.
Mintmark ANT Gamma

Ref: RIC IX Antioch 44b, rated scarce.

Contributed by Ars-Aeterna / David Suter, Switzerland, October 2009