Bust left // Archer seated right, ΠT monogram below bow, Pehlavi legends around, Ш-shaped tamgha or monogram in the left field. 18mm, 3.80 grams. Probably Herat-Sistan region. Shore 480; Sellwood 93.10. SKU T1117-52125

This type is different from the normal coins of Sanabares and bears a different mark on the reverse. It might come from a different mint or be a coin of Sanabares' successor. This variety is published in Shore #480, monogram 97, attributed to the eastern mint of Traxiane. 

Mitchiner saw a karhosti legend behind archer - he attributed this type to Ardeshir, vassal king of Sakastan, AD 230-245. Other authorities considered these coins Gondopharid (Indo-Parthian), though it is hard to place them within the Gondopharid series due to stylistic considerations. Other attributions place this issue in Margiana or the local vassal rulers of Merv and Khorasan.