Roman? Old Find With Majic Wand

Constantinopolis commemorative minted under Constantine or his sons, late 330s. Very common type.

It is probably worth nothing unfortunately - high quality examples are readily available at low prices. They issued these in huge numbers right across the empire to commemorate the capital moving to Byzantium (which was renamed 'Constantinople' in short order). At the same time, a separate design commemorated the old capital, Rome. The faces on these coins are the personifications of the cities.

As for grading, grades don't really exist for ancient coins because of how many important points there are to the value of a coin. Some grading services grade on strike and surface (etc) but it's easier to 'grade' by putting together a statement on how the coin looks, which is a subjective thing. Some people would label this a 'grot', but I'd say the details are okay and the problem is an unstable surface (on handling: keep the coin dry. The surfaces look soft, but if it is properly dried and waxed, it would probably last indefinitely).

It is. Not a great coin, not a fancy coin, but it is the only roman coin I found metal detecting. It was a great day, drank some awesome german wine, very nice lunch that day. Got to bring it back from germany! Sometimes I wonder, how it was lost, who owned it, if it's loss caused a hardship on someone or was spent to buy a guy's wife a nice present, etc. Like I said, it's not much, but it's mine!