Slightly Odd Roman Coin

Nothing really special here in that it's just an overcleaned 4th century bronze, most likely an issue of Constantius II. What interested me enough to pick it up (on the cheap, to be sure) was the particularly irregular shape. In fact it has somewhat the appearance of two overlapping flans, albeit of different diameters. The edges are unremarkable. 19.5 mm across its longest axis, with the weight coming in at 2.02 grams.