Interestingly, this coin weighs 3.14 g which is the average for real coins of this type. Persons who rely on scales alone to spot fakes will not always be safe. The edge of this coin shows no sign of a casting seam or file marks to remove them. Once upon a time this coin would have fooled me as good. After handling a few thousand denarii, I consider this one obvious.
Experience is a great teacher.
I do not know the origin of this fake. Even worse is this tourist grade fake of a denarius of Septimius Severus. This level of fake is sold to tourists by merchants and children in the Mediterranean. The surfaces are badly impaired with casting bubbles and there is an overall fuzziness to the details. The edges bear a weak seam where the two halves of the mold were joined.