SASANIAN KINGS. Ardaxšīr (Ardashir) I. AD 223/4-240. Æ Sixth Unit (18mm, 4.23 g, 1h). Mint A (Istakhr"). Phase 2a, circa 223-224. Crowned facing bust / Fire altar. SNS I Type I/2; Göbl Type I/2. Fair, mostly brown surfaces with areas of red and green."