Indeed, Delmatius (or Dalmatius), which is a lot more interesting than Constantinus I or II.
Constantine I tried to prepare his succession by promoting his side of the family from his first wife late in his life. As soon as he died, his three sons by his second wife ─Constantine II, Constantius II, and Constans─ fought a merciless massacre and eventually eliminated Delmatius and the other potential challengers to the throne. That happened between 22 May (death of Constantine) and 18 September 337 (promotion of the three to the title Augustus = emperor), a period when there actually was no-one with the title Augustus.
There are many less coins of Delmatius. This one is not that valuable, given its condition and the fact that the mintmark seems to be lost, but it still is a nice witness to a troubled period.
