Readymades of Marcel Duchamp to turn up any identical matches to photographs of the originals. However, there are accounts of Walter Arensberg and Joseph Stella being with Duchamp when he purchased the original "Fountain" at J. L. Mott Iron Works. Such investigations are hampered by the fact that few of the original "readymades" survive, having been lost or destroyed. Those that still exist are predominantly reproductions authorized or designed by Duchamp in the final two decades of his life. Shearer also asserts that the artwork "L.H.O.O.Q." which is recorded to be a poster-copy of the "Mona Lisa" with a moustache drawn on it, is
De ou par Marcel Duchamp ou Rrose Sélavy (La Boîte-en-valise) carrying case (the prospectus describes it as a "leather pull-out box"), 40 x 37.5 x 8.2 cm, containing 69 reproductions of the major works by Duchamp, including many photographs, lithographs and miniature replicas of ready-mades like "Fountain", and reduced-sizes models on (cellulose acetate) such as "The Bride Stripped Bare by Her Bachelors, Even." From 1941 to 1966, 312 boxes were produced for subscribers. The first 22, titled "La boîte-en-valise" or "Valise", were made by the artist himself (as luxury editions) and contain an original work. All are signed "De ou par Marcel Duchamp ou Rrose Sélavy" ("From or by Marcel