Silver Dirham or Damma coins issued during the reign of the Habbari dynasty, an Arab dynasty which ruled parts of Sindh (present day Pakistan) from 854-1011 AD. The Habbari's were an Arabic tribe and notionally owed allegiance to the Abbasid Caliphate in Baghdad, but were practically independent. The Habbari kingdom was destroyed by Mahmud Ghaznavi, the Afghan invader. 

These coins belong to multiple rulers of the dynasty. All of these coins are VERY RARE. Read more about the coins here 

Weight: 0.5 grams (approx)

Diameter: 9-11 mm (approx)