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      Signed in pencil by the artist lower right “Hartung”; numbered in pencil “LXVII/LXXV” lower left. This impression is identified in the artist's Catalogue Raisonné: RMM308 (‘Les Estampes’, Rainer Michel Mason, 2010) Printed at Atelier Polígrafia, Barcelona Published by Ediciones Polígrafia, Barcelona 
 
                         
                      