Czechoslovak road sign from the 1938 law (č. 82/1938 Sb. z. a n.)
<b><a href="//commons.wikimedia.org/wiki/User:Fry1989" title="User:Fry1989"><span style="color:#003384;">Fry1989</span></a></b> <sup><b><a href="//commons.wikimedia.org/wiki/User_talk:Fry1989" title="User talk:Fry1989"><span style="color:#cc111a;">eh?</span></a></b></sup>
<a href="//commons.wikimedia.org/wiki/File:1938_V%C3%BDstra%C5%BEn%C3%A9_1.png" class="image"><img alt="1938 Výstražné 1.png" src="https://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/1938_V%C3%BDstra%C5%BEn%C3%A9_1.png/100px-1938_V%C3%BDstra%C5%BEn%C3%A9_1.png" decoding="async" width="100" height="147" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/1938_V%C3%BDstra%C5%BEn%C3%A9_1.png/150px-1938_V%C3%BDstra%C5%BEn%C3%A9_1.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/1938_V%C3%BDstra%C5%BEn%C3%A9_1.png/200px-1938_V%C3%BDstra%C5%BEn%C3%A9_1.png 2x" data-file-width="463" data-file-height="682"></a>