 1968 - Yellow 1 acrylic on cotton duck Reserved |  1970/71 - Colour Steps No 3 acrylic on cotton duck Sold |
 Blue Up Green Down II acrylic on canvas |  Diptych, Red Over Zircon acrylic on canvas Sold |
 Slot oil on canvas laid on board, 1963 Sold |  Tape II Oil on paper laid on canvas, 1963 Sold |