SIEBER, FRIEDRICH (1925-2002), portfolio 'Formtendenzen der Farbe', 1971,

SIEBER, FRIEDRICH (1925-2002), folder 'Form tendencies of color', 1971, Gallery Senatore 1971, contains 7 color serigraphs, each numbered with pencil. 30/100, signed and dated, HxW: sheets approx. 40x30.5 cm. Slight signs of age, a few minim. stains, portfolio partly slightly stained, the glued inner side partly wavy.