NILS-UDO (Born 1937) The Raven, 1966 Charcoal and gouache on paper. Signed and dated lower right. 50 x 65 cm We would like to thank NILS-UDO who, through Mr. Pierre-Alain CHALLIER, authenticated these works on photograph. Galerie Pierre-Alain CHALLIER, which represents the artist, can issue a certificate of authenticity on request.

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