„Vert, a crossed crown Or on a seven oak leaves Argent in ratio 2:2:3 strewn shield.“ The arms are canting; the arms symbolise the Reichswald forest, a former Royal (and Imperial) forest. The crown shows the royal character, the oak leaves the forest.
This image is taken from www.ngw.nl – Heraldry of the World –  an international civic heraldry site by Ralf Hartemink. ngw.nl/heraldrywiki/index.php?title=Reichswalde
unknown - constructed and added by Jürgen Krause