1/3 Tanka - Shah Muhammad Basra

The Jalayirid Sultanate was in terminal collapse by the early 1420s. Shah Muhammad — the last recognized Jalayirid ruler — held a precarious grip on Basra while Timurid and Qara Qoyunlu forces had already dismembered the dynasty's former domains. Coins struck in his name from Basra represent the final gasps of a dynasty that had ruled Iraq and western Persia since the mid-14th century.

The fractional tanka denomination itself reflects constrained minting capacity rather than planned monetary policy.