The only surviving authenticated portrait of <a href="https://en.wikipedia.org/wiki/Billy_the_Kid" class="extiw" title="en:Billy the Kid">Billy the Kid</a>.  This <a href="https://en.wikipedia.org/wiki/tintype" class="extiw" title="en:tintype">tintype</a> portrait sold at auction in June 2011 for USD $2,300,000 to <a href="https://en.wikipedia.org/wiki/Bill_Koch_(businessman)" class="extiw" title="en:Bill Koch (businessman)">William Koch</a>.
<bdi><a href="https://en.wikipedia.org/wiki/en:Ben_Wittick" class="extiw" title="w:en:Ben Wittick"><span title="American photographer">Ben Wittick</span></a>
</bdi>
1879 or 1880 <div style="display: none;">date QS:P571,+1850-00-00T00:00:00Z/7,P1319,+1879-00-00T00:00:00Z/9,P1326,+1880-00-00T00:00:00Z/9</div>
<a rel="nofollow" class="external text" href="http://www.denveroldwest.com/ow-billytk.html">Brian Lebel's Old West Show and Auction</a>