Lot 3000-R-1:    Naval Gun Factory, Washington Navy Yard, Washington D.C.   Shown:  An Assembler.    Detroit Photographic Company, circa 1891-1912.  Courtesy of the Library of Congress.  Photographed through Mylar sleeve.   (2016/03/10).
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/127906254@N06">National Museum of the U.S. Navy</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/127906254@N06/25053185434/">Lot 3000-R-1</a>