GALLIENVS P F AVG (Translation: Gallienus Pius Felix Augustus. Gallienus, the pious and happy emperor (Augustus).)
Reverse description
Serapis, wearing polos on head, draped, standing left, raising right hand and holding sceptre in left hand.
Reverse script
Latin
Reverse lettering
P M TR
P XII COS V P P (Translation: Pontifex Maximus, Tribunicia Potestate Duoecima, Consul Quintum, Pater Patriae. High priest, holder of tribunician power for the twelfth time, consul for the fifth time, father of the nation.)