Gallienus, standing in quadriga left, holding sceptre.
Reverse script
Latin
Reverse lettering
P M TR
P X COS IIII P P (Translation: Pontifex Maximus, Tribunicia Potestate Decima, Consul Quartum, Pater Patriae. High priest, holder of tribunician power for the tenth time, consul for the fourth time, father of the nation.)