<p>Stamp of the German Empire - plebiscite area "Allenstein"; definitive stamp; Germania-issue (mostly war press) from 1914/15 with black, standing oval ovewrprint of the Entente-commission<br><b>Stamp</b>: Michel No. 19 <i>(= Michel No. 87II (war press of 1914/15) with overprint)</i>; Yvert &amp; Tellier: No. 19 (DR-AL); AFA: No. 19 (DR-AL)<br><b>Color</b>: grey ultramarine<br><b>Watermark</b>: Germany No. 1 (rhombs)<br><b>Nominal value</b>: 20 (Pfennig)<br></p>
<b>Postage validity</b>: from May 1920 until 20 August 1920 <div style="display: none;">date QS:P,+1920-00-00T00:00:00Z/9,P580,+1920-05-00T00:00:00Z/10,P582,+1920-08-20T00:00:00Z/11</div><br><b>Postmark</b>: Lyck, <time class="dtstart" datetime="1920-07-25" lang="en" dir="ltr" style="white-space:nowrap">25 July 1920</time><i>(Lyck (then East Prussia - Ermland - Regierungsbezirk Gumbinnen - Landkreis Lyck); contemporary <a href="//commons.wikimedia.org/wiki/Category:E%C5%82k" title="Category:Ełk">Ełk</a> in Poland)</i>
Deutsche Reichspost - "Commission d'administration et de plébiscite Olsztyn - Allenstein"
scan of original