... I just reread the information about the honorific name Alamannicus. Apparently in AD 331 a letter mentiones Constantinus II as Alamannicus, whereas before he was known as Germanicus. I am not sure, but it seems that after the victories in the 320s he was given the honorific name Germanicus which was specified as Alamannicus a few years later. The book were I found this information is about the Alamannic and the point is that sometime in the 320s/330s the Romans started to recognize the Alamanni, which hitherto had only been recognized as Germani.
the DEVICTA issue is one of my favorites. some more info This coin refers to a major victory over the Sarmatians in A.D. 322; which, however, was a big reason for the upcoming civil war with Licinius, since the territory the Sarmatians were fought in was under the control of Licinius, who viewed Constantine's actions as something of an invasion. and some some ancient sources-- “When Constantine learned that the Sarmatians, who live near Lake Maeotis, had sailed across the Danube and were pillaging his territory, he led his army against them…he killed many, took more prisoners and put the rest to flight.” Zosimus 2:21 "Licinius did not accept the gold coinage on which Constantine emblazoned his victory against the Sarmatians, but melted it down and converted it to other uses, giving no answer to those who faulted him with regard to this than that he did not wish foreign affairs to have a place in domestic business." Petrus Patricius (circa A.D. 500- 565) The Lost History of Peter the Patrician F 208 and though only officially struck for Constantine I, a few years ago I found this unofficial issue with a Helena obverse.
That is a nice find. These unofficial mints didn't really care much about the correct paring of dies. The fact that a coin with a Helena portrait was used as a model for the issue is rather unusual. I have never seen that before.