Very strange coins of Gordian I

[Flav V]

Hello,

Im maybe to much suspicious on some coins, but for me, the 4rth is obvious fake. For other coins: the 3rd look to me not in real silver. For the frist and second coin they share the same dies, similar 80% form of blank, centering.. the same light around the portraiture, same spot around letters ANV on the obverse (this can be a spot on riginal die wich print it then). This is more clear when you open it in two windows and switch fast the coins.. same light, spots.. What do you think about it?
i let the photos in order of the message description.

[Flav V]

I add about 4rth coin: not in real silver, look mold (letters linked by metal too), small black holes.

[Flav V]

No one?

[Anaximander]

This one's a challenge.

What we know: Gordian I denarii are rare and expensive, so there's potential for a modern forgery.
What we don't know: Weight, size, provenance, edge detail...
Do you have all of these in hand? None of them?

If there are modern forgeries in the group, they're likely to be very good ones. None stand out to me to be obvious fakes, at this distance, but I don't know enough now, and may never know enough to be certain.

[Flav V]

The first coin is 21.00 mm for 3.40 grs, the second is 3.26 grs, no syze found. The third: 19.00 mm for 2.67 grs. The foruth is 2.97 grs, no syze found.