 After 240, apart from two large issues struck under Gordian, the denarius was only produced locally until it was brought back by Aurelian in 270.During the reign of Gordian III, the lack of uniformity in coin weight and quality became severe, with eastern mints consistently creating heavier and purer coins.The Antoninianuses minted in Antioch had an average silver fineness of 43.5 percent, whereas those of Rome had an average silver fineness of 36.8 percent.