Crispus. 321 Ad. Ae3. London Mint

The portrait style of the London Mint coins is very distinctive, and, IMHO, very desirable. Yours is no exception.

Really nice helmet decoration, and there seems to be some silvering remaining on the reverse.

Man if I lived in Europe I would be metal detecting like crazy! Such a rich history in your guys countries. Man, here in the US I would be lucky to find a Wheat penny and a vintage beer can. There are some tall tales of Anglo Saxon coins found here in the NE, but they always turn out to be hoaxes. You don't even find Spanish coins this far north like you can in Louisiana and Florida. Finding a British coin might even make the evening news.

Yes, it is still possible to make such finds in England.

Below is a photo of a Crispus AE Follis, that was a metal detecting find from Norfolk.
I bought it in a lot of others and took it easy regarding cleaning it, giving it the respect an ancient coin deserves.
It cleaned up quite well.

London mint, around 323 AD

I soaked it in Distilled vinegar, in a small glass jar, and then sealed it with the lid.
It took only a day for the encrustation on the surfaces of the coin to become soft enough to clean off with a wooden tooth-pick.
Then put it back in to soak off any remaining encrustation, then finally let it dry.

Remember that it is often impossible to get an "uncleaned" or encrusted coin into a "mint condition" as it is highly unlikely it ever was in a perfectly struck condition.
Accept what can be easily cleaned off, and leave the rest well alone.
Once a coin is damaged, you cannot press a "rewind" button and start again.
Accept the history that is the "dirt/encrustaton" of the coin.

Of course, corrosion/BD is another thing...

Yeah, I know, got bit by the bug. Think I'll take two aspirin and see if it goes away in the morning.

Still waiting for this one to arrive. I'm beginning to weed out dealers I will never use again on VCoins.