Etnia Barcelona has introduced two new models of sunglasses, Ziggy Stardust and The Thin White Duke, to celebrate David Bowie, the British singer, composer and actor who died at the beginning of 2016. The Ziggy style is based on the costumes worn by Bowie during the so-called Glam period, including those chosen for one of his music tours, “The Rise and Fall of Ziggy Stardust,” and “Aladdin Sane.” The new styles are accompanied by a marketing campaign, “I'm imperfect,” launched by the Spanish company for the present autumn/winter season.