This bronze coin of Trajan had been struck in Rome for the Eastern part of the Roman Empire, probably Syria. It has large SC within oak wreath surrounded by legend " DAC PARTHICO " on reverse. It's listed as Semis, Dupondius, As, Orichalcum and more. They say it's an "enigmatic issue". I was astonished at the high values they assign to this coin, so long time ago. Attribution extends from RIC 644 to RIC 650. I don't know where my coin belongs. It weighs 8.5 g. Thanks..