Introduced in 1978, the P'8478 were the world's first sunglasses with replaceable lenses. These Porsche Design 40Y P'8478 Sunglasses were created to celebrate the design's 40th anniversary. The frame is done in matte black titanium with golden highlights in the form of lens holders and the signature flip-up bridge. They arrive in a special travel box with four additional sets of lenses and a smaller case. Available in two sizes and limited to just 1,978 pairs of each.