98. Auktion

Nagel, Stuttgart, 26 April 1996, Lot 2856 German Private Collection

Jan Kusters, Waalre, The Netherlands

Belgian Collection, Antwerp

Clive Loveless, London, England

Robert Banks, Washington, USA

Binoche et Giquello, Paris, Lot 2519

German Private Collection

Martial Bronsin, Brussels, Belgium Jacques & Anne Kerchache, Paris, France Ana & Antonio Casanovas, Arte y Ritual Gallery, Madrid, Spain Jean-Claude Bellier, Paris, France Sotheby's, Paris, 29 November 2021, Lot 115

Collection Madame B. Saint Germain en Laye, Paris, 23 June 1997, Lot 10

El Hadj Yende Amadou, Foumban, Cameroon (1969) UK Collection

American Private Collection

German Private Collection

Wolfgang Ketterer, Munich, 6 May 1978, Lot 353

German Collection

UK Collection

UK Collection

Edward A. Spiegel (1931-2020), New York City, USA Spiegel was professor of astronomy at Columbia University who worked on convection theory and on the application of fluid dynamics to astrophysics and was the first to discover Chaos Theory. As a professsor, he gained a reputation among his students for his amusing stories of meeting other famous scientists such as Paul Dirac and Stephen Hawking.

German Collection

Neumeister, Munich, 10 November 2005, Lot 371

Lauritz Sunde (1910-1979), Copenhagen, Denmark Christophe Rolley, Bagneux, France

probably Gottfried Künzi (1920-1979), Oberdorf / Solothurn Switzerland Martin Gross (1922-2017), Biel, Switzerland (1968)

Helmuth & Marianne Zimmer, Zurich, Switzerland

American Private Collection

Gisela & Hartwig Dehmel, Lüchow, Germany

German Collection, Berlin

Wolfgang Müller, Erfurt, Germany

American Private Collection

Colonial Collection Yves Créhalet, Paris, France

French Collection

Belgian Private Collection

Pierre Loos, Brussels, Belgium Bren Heymans, Antwerp, Belgium

Robert Temple, Ghent, Belgium

John & Nicole Dintenfass, New York, USA

Jacques Blanckaert, Brussels, Belgium (1980's) Johan Henau, Antwerp, Belgium Nadya Levi, Antwerp, Belgium Sotheby's, New York, 6 May 1994, Lot 159 Hans Petereit, Cologne, Germany Sotheby's, Paris, 15 June 2004, Lot 174 Fily Keita, Los Angeles, USA (2008)

Geert Hendrik van de Zee, Osstzaan, The Netherlands Berry de Bruijn, Breda, The Netherlands (2013) Adrian Schlag, Brussels, Belgium German Private Collection