Translated with Google Translate. Original text show .
Buri (artist name), 1919-1999, fled from Germany to the Netherlands as a boy to escape the Nazis and remained in the Netherlands for the rest of his life, founder of Atelier Buri in Amsterdam, was not only a visual artist but also a (German-language) poet; he knew hundreds of Dutch poems by heart, after having taught himself to master the Dutch language in that way while in hiding.
https://de.wikipedia.org/wiki/Friedrich_W._Buri#Literatur
Literature: Annet Mooij, The Century of Gisèle, De Bezige Bij 2018
Seller calls the work on his own authority: “Koppen”. The seller considers it quite plausible that the work has not only artistic but also historical value.