Hello, I have a pair of crosshair's that needs new lenses. But i have a problem, i can't tell are they original crosshair or 2012 crosshair. I'm told they have different lenses. I know that they are not crosshair 2.0 Is there some way on frame to tell which they are? They are matte black frames with black iridium lenses. Other arm says Crosshair (does crosshair 2012 say crosshair 2012?) Thanks!