stamped with Copyright by: Ute Klophaus (on the reverse of each print); signed, titled and dated 1969 (on the reverse of the second print); signed and inscribed (on the reverse of the third print); signed, inscribed and dated 1969 (on the reverse of the seventh print), portant la mention Copyright by : Ute Klophaus (au dos de chaque tirage) ; signé, titré et daté 1969 (au dos du deuxième tirage) ; signé et inscrit (au dos du troisième tirage) ; signé, inscrit et daté 1969 (au dos du septième tirage)
