<p>Stamp of the German Empire - plebiscite area "Oberschlesien" (Polish: "Górny Sląsk", French: "Haute Silesie", English: "Upper Silesia"), South Prussia, definitive stamp from 1920<br><b>Stamp</b>: Michel: No. 22;  Yvert &amp; Tellier: No. 40 (DR-OS); AFA: No. 22 (DR-OS)<br><b>Color</b>: black grey to blue black<br><b>Watermark</b>: none<br><b>Nominal value</b>: 50 Pf. (Pfennig)<br></p>
<b>Postage validity</b>: from 26 March 1920 until 15 June 1922 <div style="display: none;">date QS:P,+1920-00-00T00:00:00Z/8,P580,+1920-03-26T00:00:00Z/11,P582,+1922-06-15T00:00:00Z/11</div> <i>(officially)</i><br><b>Postmark</b>: Hindenburg, <time class="dtstart" datetime="1922-04-27" lang="en" dir="ltr" style="white-space:nowrap">27 April 1922</time><i>(Hindenburg O.S. (name since 1915), contemporary <a href="//commons.wikimedia.org/wiki/Category:Zabrze" title="Category:Zabrze">Zabrze</a> in Poland, then district capital in the "Regierungsbezirk Oppeln")</i>
"Commission interallié de gouvernement - Haute Silesie"
scan of original