printed by Emil Matthieu, Zürich, Switzerland; published by Felix H. Man and Galerie Wolfgang Ketterer, Munich, Germany
Inscription
inscribed in pencil l.r.: Hans Purrmann printed in green ink (in image) l.r.: Montagnola 19 März 1965 inscribed in pencil l.l.: H.C chopmark l.l.: W (vertically) K (Wolfgang Ketterer)