Upvote:3
This coin appears to be showing Constantine I, timeframe 307-337 A.D. Numerous similar coins can be seen on this search, mainly at commercial sites.
A good look from a site here
The above site lists this coin as:
DIVUS CONSTANTINE I THE GREAT (Died 337). Ae. Antioch. Struck under Constantius II and Constans.
Another good image can be seen here