Picture of emission test sticker on German licence plates.
<bdi><a href="https://www.wikidata.org/wiki/Q58237739" class="extiw" title="d:Q58237739"><span title="German photographer">Sven Teschke</span></a>
</bdi>
CC BY-SA 3.0 de
<span class="int-own-work">Self-photographed</span>