Theodosius I AE3 of Antioch. 378-383 AD. 

DN THEODOSIVS PF AVG, rosette-diademed, draped and cuirassed bust right.
CONCORDIA AVGGG, Constantinopolis, helmeted, seated facing, 
head right, on throne, holding partly seen spear and globe; right leg bare; left foot on prow.

Theta-Phi over K across fields.
Mintmark ANT Delta.

RIC IX 47d