Alexander III, AR Tetradrachm, Carrhae, struck under Antigonas I, 324-317 BC. 17.2 gr. Head of Herakles right, wearing lionskin headdress, knotted at base of neck. ALEXANDROU, Zeus seated left, holding eagle and sceptre. ST in left field, SR monogram beneath throne. Price 3802; Müller 1466. Courtesy of Henri Delger, May 2010.