1/2 Shahi - Tahmasp I Fourth Standard

Tahmasp I's Fourth Standard coinage reflects a period of relative monetary stabilization following decades of chaotic restriking and weight adjustments that had plagued Safavid silver since Ismail I. The shift between standards was administratively driven — Tahmasp issued at least five distinct weight standards across his extraordinarily long reign of over five decades, each responding to silver supply pressures, Ottoman competition, and the demands of an empire perpetually financing frontier warfare on multiple fronts.

The years 1547–1552 overlap with the Ottoman–Safavid conflict that had already seen Tabriz change hands twice.