My Oakley Bottlecap sunglasses does not have a serial number on the left arm. Are they fakes?

<br /> How to Tell If Oakley Sunglasses Are Fakes.<br />&bull;1Look for the distinctive "O" on the arms of the glasses. Genuine Oakleys always have this.<br />Make sure the glasses have metal, not plastic, frames.<br />Consider the price. If it's too good to be true, it's probably not a real pair of Oakley sunglasses. Oakleys typically start at around $100 and go up from there.<br />Look for your glasses in an Oakley catalog or on the official Oakley website. Compare the glasses in question to the picture of the official model and read the description carefully. If you can't find a matching model at all, steer clear.<br />Make sure your glasses come in a box with a microfiber cleaning bag and warranty card. The box itself should have a barcode on it and a description of the sunglasses.