Unidentified Baktrian / Indo-Scythian 'Kushanshahs' Diademed Bust AE Unit
Bronze, 2.75 grams, 16.64 mm. Peroz Kushanshahs (Indo-Sassanids) Circa 5th century AD. It looks as though there is an overstruck bust on the obverse, if you rotate it through 90 deg. to the right, you can see the diadem ties on the left and his nose on the right, but no further information apart from that it looks like it could be an ancient imitation of Baktrian and Indo-Scythian origin. We cannot find any coin with a reverse like this. Not in BMC, Mionnet, or Whitehead.
The Persian Sassanids toppled the Kushan empire between around AD 230-250, conquering large swathes of territory in the process. Included in this was the ancient region of Arachosia, which was centered on the south-east of modern Afghanistan but which at times stretched much further east, into modern Pakistan and perhaps as far as the River Indus. To counter the threat of reconquest posed by the north India empire of the Guptas, and well as by Central Asian tribes, the Sassanids created a buffer state which was governed by the Kushanshahs, the 'kings of the Kushans', or Indo-Sassanids (or even Kushano-Sassanids). Dating for the Kushanshahs is very approximate and little is known of the region under their rule.