[6][7] In the area of Sindh, from Multan to the mouth of the Indus River, an important series of gold coins was issued on the model the coinage of Sasanian Empire rulers Shapur II down to Peroz I, that is covering approximately the period from 325 to 480 CE.
[11] The expansion of the Sasanians in northwestern India, which put an end to the remnants of Kushan rule, may also have been done at the expense of the Western Satraps and the Satavahanas.
[12] Sindh coinage of Sasanian Empire rulers from Shapur II down to Peroz I are known, covering approximately the period from 325 to 480 CE.
Senior has suggested that Shapur III, who had a very troubled reign and suffered defeats at the hand of the Kushans, had been unable to issue gold coinage and had to take refuge in Sindh where he was able to strike his beautiful coins, some with the Sri symbol, and some without.
[1][13][14] Some later imitations of these coins after 480 CE may have been made by the Hephthalites, who added a Hunnic tamgha to the design, after they took over the northwestern Indian provinces.