I found a collage by Helmut Bönitz (1914-1999)…
Helmut Bönitz (1914-1999) was an artist from Göttingen, which is why he can also be found in Thomas Appel’s Göttinger Künstlerlexikon.
The collage is dated 1978, I could not find it in the catalogues of the Göttinger Kunstmarkt or in the two volumes “Arbeiten von 1945 bis 1985” by him…