I'm joining this discussion quite late I see. In fact I didn't notice this subject until I saw that there were 95 replies. I have read only a few of the replies, but I've looked at all the photos, so if I'm repeating a conclusiion that's already been reached I apologize in advance.
In my opinion all of the coins pictured in this discussion with that crappy, powdery looking green
patina are
fake.
First off the patinas. If we were looking at a single hoard, it would be possible for all the coins to have the same
patina, but we are not looking at a hoard. The range of issues and
denominations is too broad to represent a single hoard. You never find early Constantines in the same hoard as Magnentius'. The
patina is modern in my opinion and chemically
applied.
Second, the flans. Under the
patina, all the flans are uniformly smooth with the same dark brown color. There is really no variation in any of the flans, from many
mint and many different emperors. The flans in my opinion have been mass produced and are wrong for the time period. Most appear to rise slightly at the edge.
Third, the devices. All of the dies, from
Constantine to
Magnentius appear to have been cut by the same hand. There is a similarity in
style that goes from one coin to the next. While there is some variation in the
portraits, the underlying
style appears the same on all the coins. I don't like the way the letters on all the coins appear in a perfect
arc. There are no letters cut too high or too low. The
Rome mint Constantine with the seated
Roma, the
mint mark has been butchered and is completely wrong.
In my opinion none are ancient, all are
fake. Study them closely and I'd avoid this seller. You may see them show up with different patinas after whomever is making them realizes the patinas are recognizable.
Barry Murphy