Pre-Schengen passport stamp from Kunowice, Poland. Stamp still bears the official name Polish People's Republic (PRL or Polska Rzeczpospolita Ludowa).
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/14529688@N08">Ken Mayer</a>
CC BY 2.0
Derived from File:Passport10 ken mayer.jpg