Here is some poorly engraved armor (note right shoulder) from Thessalonica, worn by Licinius Jr.-- it should have looked more like what Constantine Jr. is wearing here-- it seems someone did not understand what they were supposed to engrave, unless this is what he had in mind--
Gnarly coin VictorNow he just needs to wear one of the late Macedonian horned helmets and he is ready to join Gwar!
Reminds me of this one I sold a couple months back My understanding is that the shoulder is supposed to be raised in salute or some-such.