Jaquet has a good point to make.
The quality of the whole batch of these seems to be suspiciously 'consistent'!
It would be highly beneficial to have a few detailed pictures of these coins, edge on.
There is a very good article on the 'net published by
Tesorillo.com :
ES FALSO MI DENARIO?, (it IS copyrighted)
which gives very good information on how to identify fake ancient coins. A machine translation into English is available. Heavy going for the English reader, but well worth it.
There are about 35 pages of good material to read, but this rather lengthy exercise certainly helped my skills in the identification of fake ancient coins.
I would recommend all collectors of ancient coins to read it