1/4 Tanka - Buyan Quli Khan

Buyan Quli Khan ruled the Chagatai Khanate as a puppet of the powerful amir Qazaghan, who controlled effective authority across Transoxiana while the khan held nominal sovereignty. The arrangement ended abruptly in 1358 when Qazaghan was assassinated, after which Buyan Quli himself was killed — making this issue, struck in the final year of his reign, among the last coinage produced under his name.

The Chagatai monetary system of this period was fractured across competing mints and regional powers, and quarter-tanka denominations in silver from this phase of the khanate's decline are considerably scarcer than their full-tanka counterparts.