A handgun constructed by <a href="https://en.wikipedia.org/wiki/cs:Karel_Krnka" class="extiw" title="w:cs:Karel Krnka">Karel Krnka</a>
<a href="https://en.wikipedia.org/wiki/cs:Karel_Krnka" class="extiw" title="w:cs:Karel Krnka">Karel Krnka</a> (1858 - 1926)
Published: 1 April 1887
<a rel="nofollow" class="external text" href="http://archiv.ucl.cas.cz/index.php?path=ZlataPrahaII/4.1886-1887/19/300.png">Zlatá Praha, year 1886-7, issue 19 Zlatá Praha, year 1886-7, issue 19</a>, digitized by Czech Academy of Sciences