Here's a pair of used OAKLEY eyeglass frames.  They were owned by a woman.  Marked 51  20 on the nose piece and 11-716 on inside of bow. Currently has some lightly scratched amber prescription sunglass lens that the new owner can replace with the lenses of their choice.  Black metal frames and composite straight bows.  Used but very nice condition and clean. FREE SHIPPING IN THE USA. Guaranteed to please the new owner or I'll buy it back.  Check my Feedback.