Silver 1/4 Tangka, 16 mm.
Samarqand mint, 1388-1403 AD
The three circles that figure prominently on the obverse represent the badge of Tamerlane. The inscription names Tamerlane as subject to the Chagatayid overlord Mahmud. By this time, Tamerlane had usurped all effective power, but nonetheless continued to acknowledge the Chagatayid overlords in name.