The double "piston rings" on both cuffs (of sleeves) on the uniform jacket identify the carrier of the uniform as soldier of the German Wehrmacht (with the rank of Oberfeldwebel (OR-7)) in the position of a "Hauptfeldwebel" or "Spiess" (company sergeant).
<div class="fn value">
Unknown author<span style="display: none;">Unknown author</span></div>
<table cellspacing="8" cellpadding="0" style="width:100%;clear:both;text-align:center;margin:0.5em auto;background-color:#f9f9f9;border:2px solid #e0e0e0;direction: ltr;" lang="en" class="layouttemplate partnershiptemplate"><tbody><tr><td style="width:100px;"><a href="//commons.wikimedia.org/wiki/Commons:Bundesarchiv/en" title="Logo Bundesarchiv"><img alt="Logo Bundesarchiv" src="https://upload.wikimedia.org/wikipedia/commons/thumb/4/41/Bundesarchiv-Logo-ohne-Wappen.svg/100px-Bundesarchiv-Logo-ohne-Wappen.svg.png" decoding="async" width="100" height="83" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/4/41/Bundesarchiv-Logo-ohne-Wappen.svg/150px-Bundesarchiv-Logo-ohne-Wappen.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/4/41/Bundesarchiv-Logo-ohne-Wappen.svg/200px-Bundesarchiv-Logo-ohne-Wappen.svg.png 2x" data-file-width="240" data-file-height="200"></a>
</td>
<td>This image was provided to Wikimedia Commons by the <a rel="nofollow" class="external text" href="http://www.bundesarchiv.de/">German Federal Archive</a> (Deutsches Bundesarchiv) as part of a <a href="//commons.wikimedia.org/wiki/Commons:Bundesarchiv" title="Commons:Bundesarchiv">cooperation project</a>. The German Federal Archive guarantees an authentic representation only using the originals (negative and/or positive), resp. the digitalization of the originals as provided by the <a rel="nofollow" class="external text" href="http://www.bild.bundesarchiv.de">Digital Image Archive</a>.
</td></tr></tbody></table>