Air de Paris, 1919 / 1939 reproduction Glass miniature of the original, originally made for the Boîte-en-valise, signed by Duchamp 4 x 2.5 x 2.5 cm Collection David Fleiss, Paris © Succession Marcel Duchamp, 2008, ADAGP/Paris, AUTVIS/São Paulo Image Courtesy Galerie 1900-2000, Paris