Dinar - Yazdgard I lightweight

Yazdgard I's reign was anomalous enough that later Zoroastrian tradition branded him "the Sinner" — partly for his tolerance of Christian and Jewish communities, and possibly for diplomatic overtures to the Eastern Roman court, where he was reportedly named guardian of the young Theodosius II. The lightweight dinar series attributed to his reign sits measurably below the Sasanian gold standard, a reduction whose cause remains unresolved: deliberate policy, metal shortage, or workshop variation.

The SNS Iran Iia/1a variety classification flags meaningful die-link distinctions within this type.