GALLIENVS P F AVG (Translation: Gallienus Pius Felix Augustus. Gallienus, the pious and happy emperor (Augustus).)
Reverse description
Mars, walking right, holding spear in right hand and trophy in left hand.
Reverse script
Latin
Reverse lettering
P M TR
P VII COS IIII P P (Translation: Pontifex Maximus, Tribunicia Potestate Septima, Consul Quartum, Pater Patriae. High priest, holder of tribunician power for the seventh time, consul for the fourth time, father of the nation.)