I just received a Radar frame from an order I acquired through eBay. I've done a little research on what to look for because I know eBay sellers are notorious for selling knock-offs. So, I got the package with a hard case, which seems legit, extra nose piece, and the frame inside a Oakley Custom microfiber bag. The first thing I noticed was the lack of any markings inside the temple region of the frames. The only markings are "Radar" on the left unobtainium piece and the "CE" marked on the right unobtainium piece. I assume the "CE" should be on the frame itself. Also, I am not sure if all Oakleys come with serials stamped inside the frame. I did test out the "O" emblems on the sides; they are magnetic if that holds any water. The other thing is that I didn't know the Radars came in a style without the "vent hole" on the temple. Again, I assumed all Radars came with the vent. I took some pictures and would appreciate if anyone has any input on the authenticity of the frame.