Swiss field sign allegedly used in 1422 <a rel="nofollow" class="external text" href="http://www.crwflags.com/fotw/flags/ch.html#tri">CWR-Flags</a>
T.F. Mills, <a href="//commons.wikimedia.org/w/index.php?title=User:Roadytom&amp;action=edit&amp;redlink=1" class="new" title="User:Roadytom (page does not exist)">Roadytom</a>
1997, 2010-07-15
<span class="int-own-work" lang="en">Own work</span>