Aecht <a href="//commons.wikimedia.org/wiki/Category:Breweries_in_Berlin" title="Category:Breweries in Berlin">Patzenhofer Biere</a>, Reklamemarke
<a href="//commons.wikimedia.org/wiki/Category:Albert_Knab" title="Category:Albert Knab">Albert Knab</a> (1870-1948)
<a rel="nofollow" class="external free" href="https://alphabetilately.org/BloggerFrank/knab-albert-1870-1929.html">https://alphabetilately.org/BloggerFrank/knab-albert-1870-1929.html</a>