Drawing of Czechoslovak Pilot Aviation Badge issued in 1923 and discontinued in 1954.
<a href="//commons.wikimedia.org/w/index.php?title=User:CS92&amp;action=edit&amp;redlink=1" class="new" title="User:CS92 (page does not exist)">CS92</a>
2018-01-03
<span class="int-own-work" lang="en">Own work</span>