Picked Up An Allectus!

Not a bad coin at all. I would leave it alone and not try to clean it.

Hmmm. I hope I'm wrong, but I suggest you keep your eye on this coin for a while and don't let it make contact with your other pieces, just to be sure. You lose nothing if I am wrong. I am a bit suspicious of those pale greenish spots on some of the high points. If they are the residual of bronze disease that has been washed off, it will be back.

Those spots are not verdigris, but I can't tell from the pic just what I AM seeing. So all I can do is give a caution and hope it is not necessary. If it proves out to be BD, and was not mentioned, then you may want to make sure the seller will accept a late return.

One of the points of suspicion is that the patina is uneven. Has it been compromised down to bare metal in spots? [I'm looking at the obverse, back of the head among the radiate crenellation.

If bronze disease is present and you can't return it, and you want to treat it then we can talk about sodium sesquicarbonate treatment. But let's not jump the gun.