Tetricus would also be my guess for the first coin. Although, without being able to read at least par of the name of the emperor, this is just a guess. There are other emperors too with similar portraits. The second coin starts with DN (DOMINUS NOSTER) so it's not Diocletian, I think i can read VAL after the DN so it's most likely someone from the Valentinianic dynasty. The portrait is also 4th century not 3rd so definitely not Diocletian.
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Απόσπασμα: "cro321"Tetricus would also be my guess for the first coin. Although, without being able to read at least par of the name of the emperor, this is just a guess. There are other emperors too with similar portraits. The second coin starts with DN (DOMINUS NOSTER) so it's not Diocletian, I think i can read VAL after the DN so it's most likely someone from the Valentinianic dynasty. The portrait is also 4th century not 3rd so definitely not Diocletian.
Thanks, that's helped a lot. I've definitely found the right coin type now, it's a follis with Victory facing left. There are a few very similar types, but with this amount of corrosion it'll be difficult to know for sure.