Information about a coin

[Bivolarov]

I have a coin but I can't identify it.I've been told that it's a roman silver coin from IV century but I'm not sure if it is AD or BD.Here are some pics:
http://www.imagehosting.com/out.php/t1497019_0194.jpg (http://www.imagehosting.com/out.php/i1497019_0194.jpg)
http://www.imagehosting.com/out.php/t1497029_0195.jpg (http://www.imagehosting.com/out.php/i1497029_0195.jpg)
http://www.imagehosting.com/out.php/t1497062_0196.jpg (http://www.imagehosting.com/out.php/i1497062_0196.jpg)
http://www.imagehosting.com/out.php/t1497068_0197.jpg (http://www.imagehosting.com/out.php/i1497068_0197.jpg)
http://www.imagehosting.com/out.php/t1497070_0198.jpg (http://www.imagehosting.com/out.php/i1497070_0198.jpg)
I would appreciate any help I can get.

[Cucumber]

Try better pics....please

Cucumber

[adventus]

It would really help if you could identify some of the lettering, the pics are a bit too fuzzy. It could be anyone from Geta to Severus Alexander circa 210-250 AD.