Capt. Hans Ruser. Repository: Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA. <a rel="nofollow" class="external free" href="https://www.loc.gov">https://www.loc.gov</a> Public Domain.
Unknown author<span style="display: none;">Unknown author</span>
between 1904 and 1930 <div style="display: none;">date QS:P,+1950-00-00T00:00:00Z/7,P1319,+1904-00-00T00:00:00Z/9,P1326,+1930-00-00T00:00:00Z/9</div>
Library of Congress