Heinz KELLER (1928–2019) “Stages of Life”, black woodcut on rice paper, signed lower left and dated 1980, numbered 9/50. H. 58.5 x 39 cm H. 58.5 x 58 cm H. 58.5 x 39 cm H. 58.5 x 58 cm Heinz Keller: graphic artist, lithographer, wood-engraver and painter. Born on 29 November 1928 in Winterthur, died there on 29 September 2019. Trained as a graphic artist and lithographer. 1949: School of Arts and Crafts, Zurich, Professional Class in Graphic Arts. Worked as a graphic artist until 1962, then worked independently as a wood engraver and painter. 1961: Co-founder of the magazine Xylon<