Kölner Kunstmarkt 70. 1970. The portfolio comprising 27 sheets: Drawing (1), etching (1), color aquatint (1), lithographs (5), of which 2 in colors, silkscreens (12), of which 9 in colors, embossing prints (3), color offset lithographs (1) and color offset (3). With a double sheet, list of artists and imprint as well as with a bound exhibition catalog, published by 'Verein progressiver deutscher Kunsthändler e.V.', Cologne 1970. All sheets signed (23) and monogrammed (4), some dated (16), numbered (27), titled (5) and inscribed (1), some on verso. From an edition of 250 copies. On different types of paper. Up to ca. 45 x 32 cm (17.7 x 12.5 in) , some the full sheet. Comprises: K. F. Bohrmann, V. Bonato, C. Böhmler, A. Cote, K. Danby, G. Gasioroski, B. Gironcoli, J. Grützke, E. Hauser, J. Hennemann, H. E. Kalinowski, W. Knaupp, F. Koenig, F. Kriwet, N. Krushenick, G. Kuehn, S. LeWitt, H. Mack, Palermo, A. R. Penck, O. Piene (Rottloff 92), S. Polke, B. Polk/G. Richter, R. Schwarz, L. Stafford, C. Twombly (Bastian 28), H. P. Zimmer. Loose sheets in original paper wrapper, there typographically inscribed with the artuist's name. In original case. The complete set. The work by H. P. Zimmer is erroneously mentioned as "Zimmermann, Hans Peter" in the imprint. [CE].