Wolfgang Güllich
<a href="//commons.wikimedia.org/wiki/User:Immanuel_Giel" title="User:Immanuel Giel">Immanuel Giel</a>, derivative work <a href="//commons.wikimedia.org/wiki/User:L%C3%A4mpel" title="User:Lämpel">Lämpel</a>
<span class="int-own-work" lang="en">Own work</span>