<b>Korvettenkapitän</b> Karl August Nerger, Kommandant von SMS Wolf
<bdi><a href="https://en.wikipedia.org/wiki/en:Nicola_Perscheid" class="extiw" title="w:en:Nicola Perscheid"><span title="German photographer (1864-1930)">Nicola Perscheid</span></a>
</bdi>
1918. The Wartenburg Trust asserts that all the images in their collection were published in Europe as postcards or prints prior to 1921.
<p>Postkartenvertrieb Willi Sanke, Postkarte #633<br></p>
<b>Immediate source</b>: Private Collection – Wartenberg Trust