signed with the artist's initials and stamped copyright by abisag tüllman and Copyright Inge Werth (on the reverse of each print); signed and titled in pencil (on the reverse of the fifth print); signed, titled and dated 1969 (on the reverse of the eighth print), signé des initiales de l'artiste et estampillé copyright by abisag tüllman et Copyright Inge Werth (au dos de chaque tirage); signé et titré au crayon (au dos du cinquième tirage); signé, titré et daté 1969 (au dos du huitième tirage)
