I don't have any clue as to the bust either. Looks a bit like Augustus?, but the coin has the fabric of a later issue, maybe? I'm not often stumped, but this little bugger is testing my patience. It looks generally Thracian.
Possibly Nikaia similar to this Geta (but I'm not sure about Geta): http://www.arminius-numismatics.com/coppermine1414/cpg1414/albums/userpics/10001/thumb_11342.jpg