Another one from my lot, that I had considered un-attributable. But I decided to give it a shot. Opened Helvetica's Excel on Fallen Horseman types and gathered up what clues I could get from this coin that had nothing left in exergue. It is a Constantius II (pearl-diademed curaissed), it is 19 mm (would have been larger if it was whole), the horseman has a Phyrigian helmet but no beard, he is clutching, and the reverse is FEL TEMP RE-PARATIO. Narrowed it down considerably but I still had quite a few that my coin may be. I then noticed a dot in the left field, so I checked if a dot was possible there. The only thing I found was "dot S dot" in the Left Field column. Looked at it again and saw a really faint S to the left of that dot. I chose "dot S dot" for the left field and only one attribution showed up, RIC 116 Constantinople. It's
barely visible in the reverse pic, but if you look hard enough you can see the dot to left, and maybe even the "S". It's a little better in hand.
