Review: Porsche Design。Iconic Aviator P8478 in Gold 69 mm Like new, comes with case, cleaning cloth, and spare lens. No scratches or fading. Porsche is selling on website for $545 The Porsche Design sunglasses P´8478 are the first sunglasses in the world with an interchangeable lens mechanism.​ ​ Teardrop-shaped Base-6-Curve lenses with quick release for quick replacement in different lighting conditions.​​ Frame made of extremely light titanium.​ Durable, scratch-resistant lenses made of virtually unbreakable polycarbonate.​​ Delivered with an additional pair of interchangeable lenses.​ Item no.: 4044709510374