Superb Ancient Kings of Parthia silver drachm of Artabanus II or Artabanus III minted in Ecbatana

Kings of Parthia AR silver drachm with original toning
Minted in Ecbatana
Size: 22mm Weight: 3.7 grams 
Obverse: Head facing left wearing diadem. No other symbol around the head. Long square cut beard. Hair straight, no wart. The earring is visible
Reverse: ΒΑΣΙΛΕΩΣ ΒΑΣΙΛΕΩΝ ΑΡΣΑΚΟΥ ΕΥΕΡΓΕΤΟΥ ΔΙΚΑΙΟΣ ΕΠΙΦΑΝΟΥΣ ΦΙΛΕΛΛΗΝΟΣ Archer on throne seated right 

Parthia (Old Persian: 𐎱𐎼𐎰𐎺 Parθava; Parthian: 𐭐𐭓𐭕𐭅 Parθaw; Middle Persian: 𐭯𐭫𐭮𐭥𐭡𐭥 Pahlaw) is a historical region located in northeastern Greater Iran. It was conquered and subjugated by the empire of the Medes during the 7th century BC, was incorporated into the subsequent Achaemenid Empire under Cyrus the Great in the 6th century BC, and formed part of the Hellenistic Seleucid Empire after the 4th-century BC conquests of Alexander the Great. The region later served as the political and cultural base of the Eastern Iranian Parni people and Arsacid dynasty, rulers of the Parthian Empire (247 BC – 224 AD). The Sasanian Empire, the last state of pre-Islamic Iran, also held the region and maintained the seven Parthian clans as part of their feudal aristocracy.