Normal Arabic inscriptions on both sides, name of Nasr in the double circle, Kalima, mint (Ferghana) and date (391 AH = 1000 AD). Mint of Ferghana. 25.5mm, 2.4 grams. cf. Zeno 42501; Kochnev 77.

This type was minted between 391 and 392 AH (1000-1001 AD) in the mint of Ferghana. The date one the coin is 391, with "300" omitted, "90" and much of the date/mint formula interestingly abbreviated. 

The Kara-Khanid Khanate was a confederation of Turkic tribes ruled by a dynasty known in literature as the Karakhanids or Ilek Khanids. Both dynastic names represent titles with Kara Kagan being the most important Turkish title up till the end of the dynasty. The Khanate ruled Transoxania in Central Asia from 999-1211. Their capitals included Kashgar, Balasagun, and Uzgen.