Carthage follis of Constans II or Constantine IV?

[Obryzum]

Hello everyone. I know this board has grown quiet in recent weeks, but I wonder if anyone might have some ideas about this coin from Carthage. It seems to me it must be a coin of either Constans II or Constantinve IV. It's about 18mm. Very thick.

I am not aware of any issues with four figures like this. One side appears to have legends, and the crowns on the emperors have semi-circles. The other side has no legends, and the emperors are both holding a globus cruciger and have simple crosses for the crowns.

The big X looks overstruck, but that seems to be the only feature overstruck.

Any thoughts?

[Obryzum]

So it looks like this is Sear 1062, the half follis with Constans II and Constantine IV on the obverse, and Heraclius and Tiberius on the reverse.  There should be an XX in the exergue on the reverse. The XX is not visible, but it is easy to visualize where the exergue should start.