Modern and Contemporary Art German Post-War Modernism Koller, Oskar Abstract landscape composition. 1968. Watercolour on textured vellum. 28 x 38 cm. Signed and dated. – Corners show barely noticeable wear. Overall in very good condition, with vibrant watercolour tones. Koller’s body of work in delicate watercolours is characterised by a sense of lightness that subtly combines form and colour. This piece is a fine example of this. Watercolour on textured vellum. Signed and dated. - Corners show barely noticeable wear. Overall in very good condition, with vibrant watercolour tones. - Koller’s body of work in delicate watercolours is characterised by a sense of lightness that subtly combines form and colour. This piece is a fine example of that style.