Afghanistan, 750-900 AD., Shahi Kings of Kabul and Gandhara, Spalapati Deva, Kabul mint, Drachm, Tye 7.

Afghanistan, Hindu Shahi Kings of Kabul and Gandhara (Ohind), Spalapati Deva, Kabul(?) mint, ca. 750-900 AD.,
Drachm (17-18 mm / 3,20 g),
Obv.: mounted horseman right, standard in right, symbols to upper l. and r. field.
Rev.: "Sri Spalapati Deva" in Brahimi, humped bull seated left.
Tye 7 ; http://www.zeno.ru/showphoto.php?photo=31876 .

Spalapati Deva is a title equivalent to "Military Commander", rather than the name of a specific ruler. The Turk Shahis (2nd Nezak Hun Dynasty) who ruled of the Kabul valley were most likely the descendents of the Kushans. They practiced Buddhism and were amongst the last non-Muslim rulers of the Kabul valley.

Thoughts on the Horseman King iconography by "Lloyd T" :
The image of the king as horseman in the ancient world was most prominently displayed on the drachms and tetradrachms of the Indo-Scythian and Indo-Parthian rulers Azes and Gondophares. These kings were originally of nomadic stock from the Scythian steppes. They ruled over the sedentary populations of northwest India in the 1st century BC. In image they were represented to their subjects as mounted warriors on the coins they issued. The tradition of presenting nomadic rulers as mounted warriors persisted in Afghanistan and North West India for the next millennium. Coinage of Zabul around the 7th century, of the Shahis around the 8th century, and the Ghorids in the late 12th century, continued this tradition. The design was carried into the Asia Minor starting around 1040 in the conquests of the nomadic Seljuqs. The Seljuqs began to strike coin in the former Byzantine territories of Asia Minor around the mid 12th century and the horseman type dominated their copper issues, and even spread occasionally onto their silver. From there the design was transferred to the Christian buffer states of the Near East. Armenia almost certainly adopted its horseman type from Seljuq models in the late twelfth century, followed by Trebizond in the mid thirteenth century. From these states the design inspiration of the horseman leader appears to have rapidly spread through the western world.