Firmenlogo <a href="https://de.wikipedia.org/wiki/Alfred_Gauthier_Calmbach" class="extiw" title="de:Alfred Gauthier Calmbach">Alfred Gauthier Calmbach</a>
Unknown author<span style="display: none;">Unknown author</span>
<span class="int-own-work" lang="en">Own work</span> (<span lang="en" dir="ltr">Original text: <i><bdi lang="">Eigene Bearbeitung</bdi></i></span>)