Hi Derick, Coin #1 I believe is actually Constantine II. Clearly from Ticinum with TT in exergue. Without being able to fully read the obverse legend the determining factor becomes the bust type. Constantine I only had this type minted with a plain Laureate bust and this coin looks to be laureate, draped and cuirassed, thus Constantine II. Coin #2) I have no opinion. Seeing the reverse would help. Coin #3) Pretty sure based on the obverse legend break that this is Constans from Siscia. Regards, -Kurt