A staged and posed joke photo of a young lady in prim 1890s clothes (at left) pretending to be startled by a 1920s <a href="https://en.wikipedia.org/wiki/flapper" class="extiw" title="en:flapper">flapper</a> (Lois Long, at right).
<bdi><a href="https://en.wikipedia.org/wiki/en:Edward_Steichen" class="extiw" title="w:en:Edward Steichen"><span title="American photographer, artist and curator (1879-1973)">Edward Steichen</span></a>
</bdi>
early 1920s <div style="display: none;">date QS:P,+1920-00-00T00:00:00Z/8,P4241,Q40719727</div>
<p><b>Immediate source</b>: <a rel="nofollow" class="external free" href="http://www.walloffemmes.org/2011/03/lois-long-1901-1974.html">http://www.walloffemmes.org/2011/03/lois-long-1901-1974.html</a><br></p>
It appears in the book "Flapper" by Joshua Zeitz, where it's said to be an early 1920s Edward Steichen photo