Rare Ray-Ban Caravan sunglasses made by Bausch & Lomb around 1970, a high-end "1/30 10K GO U.S.A" gold-filled model. These are gold-filled, meaning 10-karat gold is layered over brass (the core material) using heat and pressure, also known as "kinbari" (gold-filled). This method offers far greater durability and a more luxurious feel than standard plating. This 10K gold-filled Caravan is a high-end model from the Bausch & Lomb era, not available in current Ray-Ban models (made in Italy), and is a rare item with very limited market availability. Especially those with the "1/30 10K GO" engraving are from the higher-end line and are highly sought after by collectors, with prices rising both domestically and internationally in recent years. *Even in Bausch & Lomb Ray-Bans, some models from the early to mid-1970s may not have the "BL" engraving on the lenses. It has been confirmed that high-end models like the Caravan, Olympian, and Shooter were shipped without the engraving.* ☆From a collection☆ Brand: RAY-BAN Made in: USA (Bausch & Lomb) Model: Caravan Engraving: B&L 1/30 10K GO U.S.A Material: 10K Gold-filled (Gold-filled) Year: 1970s Lenses: Non-prescription (No BL etching) Lens Color: G-15 (Green) Frame: Gold-filled Size: Lens Height 4.7cm Lens Width 5.8cm Bridge Width 1.6cm Temple Length 13.0cm Accessories: B&L original case (Vintage) [Product Condition] There are no noticeable scratches or stains on the lenses or frame. There are no noticeable scratches or stains on the case. Overall, the item is in good condition. *Please refer to the photos.* Please understand that this is a used item, and only bid if you are comfortable with this. #RayBan #BauschLomb #Caravan #MadeInUSA #GoldFilled