Gucci Sunglasses GG-0879-S 001。Like new condition. I do not have sunglasses case any longer. Purchased in 2022 so no longer have receipt of purchase or authentication certificate. Sunglasses DO have frame engraving on right arm including the Gucci logo, Made in Italy tag and letters CE for European Conformity. Frame engraving on left arm which includes model number on the inner left arm, including color code and measurements for lenses and frames. Gucci uses these specific codes in place of a serial number. I would be happy to help authentication of these glasses in any way that I can.