We hope you were impressed by the sunglasses on our new SunVision magazine cover. Part of the 20/20 tradition with this special sunwear supplement is to have some fun finding glasses but leaving them uncredited so readers can gamble a guess. This time around we're challenging the gamble with the prize of a $25 gift certificate to Amazon awarded to the first reader correctly identifying these classic frames. No hints (well actually, there is one but it's hidden in the text) and no frame vendors or manufacturers allowed. This one needs to come from one of the three Os out there eager to stake their claim as masters when it comes to eyewear's rich heritage. Email your response to firstname.lastname@example.org.