Logo of former german sportclub <a href="https://en.wikipedia.org/wiki/Concordia_K%C3%B6nigsberg" class="extiw" title="en:Concordia Königsberg">en:Concordia Königsberg</a> (1911-1945)
Originalautor Unknown author<span style="display: none;">Unknown author</span>, nachgezeichnet von Marcus A.M. Keune
basend on official blazon &amp; on an image from Grüne, Hardy (2001). Vereinslexikon. Kassel: AGON Sportverlag <a href="//commons.wikimedia.org/wiki/Special:BookSources/3-89784-147-9" title="Special:BookSources/3-89784-147-9">ISBN 3-89784-147-9</a>