Victor Obstaz, Portrait of Marcel Duchamp, 1953, Gelatin silver print, 13½ x 10½ in. (34.3 x 26.7cm)
Victor Obstaz, Portrait of Marcel Duchamp, 1953, Gelatin silver print, 13½ x 10½ in. (34.3 x 26.7cm), Titled, signed and dated on verso -- source link
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