During the so called "socialism" in Berlin all kind of artworks were produced by many artists. One of them was Erwin Damerow who faught in the WW2, was caught by the Sowjets and later lived in the DDR where he created several artworks which you can find all over the places where I live now. Actually after the Grayffiti was put on, it became a dark piece of bronze. I scanned it on a very bright spring day during the pandemic for one hour.
https://de.wikipedia.org/wiki/Erwin_Damerow