Sasanian Kingdom. Ardashir I. Silver Obol (0.7 g), AD 223/4-240. Mint C ("Ctesiphon"), ca. 233/4-238/9. Diademed bust of Ardashir I right, wearing mural crown. Reverse: Fire altar with diadems. SNS type V(4a)/3a(2b); Gbl type IV/2; NAP 723. Very Rare. Toned. Choice Very Fine. Estimated Value $400 - 500