 These invaders initially issued coins based on Sasanian designs.Various coins minted in Bactria and based on a Sasanian designs are known, often with busts imitating Sasanian kings Shapur II (r.309 to 379 CE) and Shapur III (r.383 to 388 CE), adding the Alchon Tamgha and the name "Alchono" in Bactrian script on the obverse, and with attendants to a fire altar on the reverse.Shapur died in 379 and was succeeded by his slightly younger brother Ardashir II, who agreed to rule till Shapur's son Shapur III reached adulthood.