Prototype <a href="https://en.wikipedia.org/wiki/Blowback_operation" class="extiw" title="en:Blowback operation">blowback-operated</a> self-loading pistol made by <a href="https://en.wikipedia.org/wiki/John_Browning" class="extiw" title="en:John Browning">John M. Browning</a>, US patent <a rel="nofollow" class="external text" href="https://patentimages.storage.googleapis.com/93/47/ae/7b84ead8094878/US580926.pdf">No. 580926</a> (applied 31 October 1896, granted 20 April 1897).<br>Browning developed this design into the <a href="https://en.wikipedia.org/wiki/FN_M1900" class="extiw" title="en:FN M1900">FN Model 1899/1900</a>.
Unknown author<span style="display: none;">Unknown author</span> for US Army
<a href="https://en.wikipedia.org/wiki/Edward_Clinton_Ezell" class="extiw" title="en:Edward Clinton Ezell">Edward Clinton Ezell</a>: <i>Handguns of the World. Military Revolvers and Self-Loaders from 1870 to 1945.</i> Stackpole, <a href="//commons.wikimedia.org/wiki/Special:BookSources/0-88029-618-6" title="Special:BookSources/0-88029-618-6">ISBN 0-88029-618-6</a>, p. 267 <small>(descriptions are mismatched there)</small>.