Hatra, Mesopotamia. AE18 semi-autonomous issue, ca 200-100 BC. 6.71 g. 

Radiate head of Shamash (Helios) right.
Camel right with rider.. 

Seyrig Nisibis 13-14; Slocum pl. 7C.

With permission of cngcoins.com, Mail Bid Sale 79, Lot 714, Sept 2008

Cf. H. Seyrig, “Trésor monetaire de Nisibe,” RevNum, 5th ser. vol. 17 (1955), p. 89, 13-14
(http://bibnum.enc.sorbonne.fr/files/original/7cc5196fa60adf690200f9a52a970ccf.PDF)