Yesterday I received from the postman my first pair of Frogskins. I bought it through a portuguese sales site that I think is the same gender of US Craigslist. The seller is the same who a few months ago I bought a pair of matte black Holbrooks and then everything went well. The Frogskins are supposedly "used" and the lenses show it well. the frame is polished white is ok. however, since they were damaged I bought a pair VL Yellow Gold and so now it seems like I have SW special series... I don't have the glasses here with me because I'm at work but my doubt came because I was reading in a topic that the stems should have a "spring" effect when you open or close, as is normal with other frames. I thought that as the frame is more classic style like Rayban, this effect in the stems does not exist and so I did not care when received the sunglasses. Furthermore, there is a lens that has a small gap in the frame which does not appear normal to me. is there any simple way to confirm that these glasses are fake or not? when I was in the buying process I have seen many sites of fakes made in China and in all it appears in the frame between the lenses the OAKLEY logo and also a little O on the lenses. in my case, these two signs aren't there and I think that has even written a serial number in black in the inside of the stem. the "Frogskins" and "Made in the USA" are there too, so I'm very confused.