La ilah illa / Allah wahdahu / la sharik lahu (“There is no God but Allah alone, no partner to him”) within a border consisting of dashes and circles // Muhammad / rasūl Allāh / al-Mulku Lillāh / Mahmud ("Muhammad is the messenger of God, Kingship belongs to God, Mahmud”). 11mm, 0.58 grams. Uncertain mint (Ghazni?). Fishman/Todd "The Silver Damma" #GH1.

Rated RR in Fishman/Todd - this is the heaviest, and probably the earliest silver fractional dirham from Ghazni. Probably intended as a 1/4 or 1/5 dirham. 

Ghazna type, issued directly under the Ghaznavid Sultan.

Mahmud of Ghazni (r. 998–1030 CE) was the most celebrated ruler of the Ghaznavid Empire, transforming it into a major power stretching from Iran and Central Asia to northwestern India. Renowned as both a military commander and patron of learning, he launched numerous campaigns into the Indian subcontinent, greatly expanding his empire and accumulating immense wealth. His court at Ghazni became a flourishing center of Persian culture, attracting scholars such as Ferdowsi and Al-Biruni. Mahmud is remembered as one of the most influential Islamic rulers of the early medieval period and for establishing Ghazni as a leading political and cultural capital.