An old German protection signal in position Ve 1 (disc lowered, which means STOP) by the bascule bridge over the Ems-Jade canal on the Oldenburg-Wilhelmshaven railroad
<a href="//commons.wikimedia.org/wiki/User:Jacek79" title="User:Jacek79">Jacek Rużyczka</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>