My updated NEWPS for the year in US, World, and Ancient Coins Posted February 18, 2016 · Report reply Nice stuff, JCM. Question about the Ionia 1/24 Stater: how is it AU and not EL? I thought at that time people hadn't developed refinement technology yet to purify EL into AU? EVP AU is the grade. The metal is clearly specified as EL. Brain cramp. I blame a prolonged period of lack of enough sleep.