Publisher's mark of the photo studio of <b>Arnold Mocsigay</b> in Hamburg.
<bdi><a href="https://www.wikidata.org/wiki/Q63972651" class="extiw" title="d:Q63972651"><span title="German photographer of Hungarian origin.">Arnold Mocsigay</span></a>
</bdi>
<a href="https://de.wikipedia.org/wiki/%C3%96sterreichische_Nationalbibliothek#Bildarchiv_und_Grafiksammlung" class="extiw" title="de:Österreichische Nationalbibliothek"> ÖNB, Bildarchiv Austria</a>, Inventarnummer Pf 1981:C(7)<br><small>( <a rel="nofollow" class="external free" href="https://www.bildarchivaustria.at/Pages/ImageDetail.aspx?p_iBildID=5618102">https://www.bildarchivaustria.at/Pages/ImageDetail.aspx?p_iBildID=5618102</a> )</small>