Silver tetradrachm, 27mm, 9.55gm, issued 40/39 BC.
Obv: Diademed head right with long beard.
Rev: [B]AΣ[IΛEΩΣ] ATTAMHB[ΛOY] ΣΩTHPOΣ KAI EYEPΓETOY (ΓOΣ in ex.), Naked Herakles seated left resting club on knee.
References: Sear 6182.
This small quasi-independent kingdom on the delta of the Tigris and Euphrates rivers were subject to the Parthians.