How does one remain a visionary? Only a few years after the breakthrough of the Chronograph I, Porsche Design achieved its next global success. With the P’8478, product design history was re-written. These were the first sunglasses in the world to feature an interchangeable lens mechanism, allowing for adjustments to different light conditions. Few products demonstrate inventive spirit better than these and they became an instant classic. The P’8478 and 50 other Porsche Design products that made history can be found in the ‘50 Years of Porsche Design’ coffee table book, recently published as part of our 50th anniversary Visit the Porsche Design 50Y Microsite to find out more. #50YPorscheDesign #ItsAboutTime #PorscheDesign #Eyewear #Sunglasses #Anniversary #CoffeeTableBook #DesignHistory #P8478