The complete set of four offset lithographs on marbled Jura-Bütten board (grey, yellow, green, and blue resectively), the full sheets,

1971

three S. 25 1/8 x 33 in. (63.8 x 83.8 cm)
green S. 25 1/8 x 32 3/4 in. (63.8 x 83.2 cm)

all signed and dated `71' in pencil (the editions were 237, 141, 120 and 142 respectively), published by Griffelkunst-Vereinigung Hamburg-Langenhorn e.V., (all with their inkstamp on the reverse), all unframed.