Royal formula of Parthian coinage

Greek inscriptions similar to "ΒΑΣΙΛΕΩΣ ΒΑΣΙΛΕΩΝ ΑΡΣΑΚΟΥ ΕΥΕΡΓΕΤΟΥ ΔΙΚΑΙΟΥ ΕΠΙΦΑΝΟΥΣ ΦΙΛΕΛΛΗΝΟΣ", meaning "[coin] of king of kings Arsaces, the benefactor (Euergetes), the just (Dikaios), the illustrious (Epiphanes), friend of the Greeks (Philhellen)", are found on coins of the Parthian Empire, starting from the reign of Artabanus I.[1] Some variations of this inscription exist.

the inscription "ΒΑΣΙΛΕΩΣ ΒΑΣΙΛΕΩΝ ΑΡΣΑΚΟΥ ΕΥΕΡΓΕΤΟΥ ΔΙΚΑΙΟΥ ΕΠΙΦΑΝΟΥΣ ΦΙΛΕΛΛΗΝΟΣ" in a highly stylized variant of the Greek alphabet[1]
Royal formula on the reverse of a coin of Pacorus I

The name Arsaces indicates the Arsacid dynasty and appears until the period of Phraates IV.[2]