<p>Flagmakers making naval flags in the <a href="https://en.wikipedia.org/wiki/Brooklyn_Navy_Yard" class="extiw" title="w:Brooklyn Navy Yard">New York Navy Yard</a> in 1914.  The flag in the background is a presidential flag of the time, which took a full month to make.  This appears to be the design introduced in 1902, featuring the Great Seal of the United States but with stars surrounded by a "sunburst" of rays in the crest, and no clouds.  The presidential flag would change again in 1916.
</p>
The original caption read <i>Measuring and stitching flags on the floor. The President's flag in the background requires the longest time of all flags to make</i>.
Lillian E. Zeh (article states she took the photographs too).
between 1913 and 1914 <div style="display: none;">date QS:P,+1913-00-00T00:00:00Z/8,P1319,+1913-00-00T00:00:00Z/9,P1326,+1914-00-00T00:00:00Z/9</div>
From the article "Making Flags for the U. S. Battleships" by Lillian E. Zeh in the January 1914 issue of <i><a href="https://en.wikipedia.org/wiki/Overland_Monthly" class="extiw" title="w:Overland Monthly">Overland Monthly</a></i>.  Taken from the <a rel="nofollow" class="external text" href="https://archive.org/details/overlandmonthly263sanfrich">archive.org scan</a>, page 91.