Identification Of Small Hemidrachmes ?

A lot of them seem to feature the same or a similar obverse. They don't appear to be Greek to me. They look like coins from the Parthian Empire which spanned from 247 B.C. until 224 A.D. I really only know about coins of the Roman Empire, but there maybe someone else who knows more about them than I do. Try posting this over in the ancients forum!

Oh and by the way,

Socrate: Welcome to the CCF!

Definitely Parthian bronzes. The silver is more commonly found.
Quite a nice little group!

As far as the denomination is concerned, the naming of them is uncertain.

I have Percy Gardner's book
The Coinage of Parthia (publ. 1968, San Diego), illustrates quite a few bronzes, gives their mass, but not their denomination.

Socrate: Have a look at the
'tesorillo' website, to educate yourself in the identification of fake ancient coins.
It is Spanish based, but if you can read Spanish, that would be an advantage for you.
Some of information is mechanically translated into English and French.

Your sestertius of Nero looks OK on the screen, but if you are doubtful, it will require close examination by an expert.

The 'Calgary Coins' website also has good information on the identification of fake ancient coins.