Need ID of this Tiny Ancient

Greetings. The diameter of this ancient coin measures only 13 mm. That is the smallest coin I have ever got. Could you please assist me in identifying it. I apologize for the poor condition. Thanks..
Charles

 

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Pictures would be a big help...

 

Thank you for replying, so that you could solve with me this problem that I am encountering for the first time on this great site. In fact , I wanted to post the pictures as usual /. But there was no " Manage attachment". What can I do?
Charles

 

I believe this is a 2 soldiers reverse type as used by Constantine the Great and his sons. Compare to the ones on my page:
http://www.forumancientcoins.com/dougsmith/dd02.html

I believe I see AN in the mintmark which would make it Antioch mint but the obverse is not clear enough to assign it to one of the rulers that used the type.

 

Thanks Doug. The face on obverse looks like Delmatius with this long face.
Charles

 

Based on the spacing of the letters, I'd guess Constans.

 

Did this tiny Roman coin have any denomination?
Charles