There is something odd about the reverse legend but can it be explained. It is a genuine product of the mint at Ticinum with PXXT in exe.
Take two reverse dies. Both with Sol and two captives being used at the same time, one with SOLI INVICTO and the other with ORIENS AVG. The obverse die is the same. A coin is struck, gets stuck and the reverse dies are swapped and the coin is struck again with the second die but resulting in only a partial overstrike. From this we can draw a conclusion that two reverse dies were being used alternately to strike coins, which would help explain away an issue raised during some experimental archeology making coins where the dies over heat.
Well, Martin, my guess is the reverse since nothing strikes me as 'unusual' about the obverse----and without researching, I'd go with JA and pick the legend (SOLIINSAVG?).... EDIT: Martin, your answer popped up just as I posted..