Extremelly weird, but Tomis did NOT mint any silver coins !!!
See here the most beautiful greek coin i ever handled. (add it too :)  )
Its 21mm, i dont have a clue whos the guy on the obverse. 
The back is  eagle holding thunderbolt,  TO MI T wN  mark: Q     
It is amazingly bold.  The portrait is *thicker* than the flan !!