Shahi - Tahmasp I Astarabad, Sixth Western Standard

Tahmasp I ruled the Safavid Empire for over fifty years — the longest reign of any Safavid shah — and his monetary system underwent several regional standardizations as the empire consolidated control over disparate provincial mints. Astarabad, situated on the southeastern Caspian shore, occupied a strategically sensitive position near the Turcoman frontier and saw irregular mint activity across the reign. The "Sixth Western Standard" designation reflects the cumulative weight reforms Tahmasp imposed on his silver coinage, driven partly by the chronic shortage of consistent bullion supply and partly by the need to align regional issues with the empire's broader fiscal administration.