Shahi - Tahmasp I Yazd, Sixth Western Standard

Tahmasp I ruled for over fifty years — the longest reign of any Safavid shah — and his coinage reflects the administrative complexity of managing an empire perpetually squeezed between Ottoman pressure from the west and Uzbek incursions from the east. The "Sixth Western Standard" designation tracks a specific weight reduction sequence imposed during his reign as silver supplies fluctuated and military expenditure mounted. Yazd, positioned along the central Iranian plateau trade routes, was a consistent secondary mint throughout this period.