Achaemenid Kings of Persia, Time of Darios I to Xerxes I (ca 485 BC) AR Siglos (Silver, 4.84g, 15mm).
Obv: Persian king or hero in kneeling/running stance right, holding spear and bow
Rev: Incuse punch.
Ref: Carradice Type IIIa (pl. XII, 17); BMC Arabia pl. XXV, 11.