I’ve found an etching by Otto Eglau (German) (1917–1988) (on artnet)…
Otto Eglau studied at the Berlin University of the Arts. In 1953, he became a lecturer in free painting and drawing at the Faculty of Architecture at the Technical University of Berlin. Between 1951 and 1970, he undertook extensive study trips.
He maintained a lifelong connection with Sylt. From 1983 onwards, he also ran a studio in Kampen. Consequently, stages were a recurring motif for him, though it was not only the North Frisian coast that he captured in abstract views.