Mixed lot of 4 graphic artists of different contemporary artists: Bernhard Heiliger (1915-1995), o.T., lithograph, signed and dated (19)60 on the lower right, Wolf Kahlen (*1940), ''ein und aus'', color offset, signed, numbered and dated 1988, Mauro Reggiani (1897-1980), lattice construction, color lithograph, signed and numbered 134/280, as well as lithograph with wave pattern by an unknown artist, indistinctly signed and dated (19)78, sheet sizes up to 70 x 50 cm