http://augustuscoins.com/ed/Persis/ Numerous coins are illustrated there. Here is one: A silver drachm of King Vahsir (a.k.a. Oxathres), son of Darius II. First century BC. 22-17 mm. 4.01 grams. Bust of king left. Inscription in square around king on left standing and holding up a scepter(?) and facing an altar. van't Haaff 582/585. By the way, the main reference work for the coins is available for free in pdf from CNG. The link is given at that page.