A closer look at the signal post in <a href="//commons.wikimedia.org/wiki/File:Concrete_signal_post,_King%27s_Lynn_harbour_branch,_2021.jpg" title="File:Concrete signal post, King's Lynn harbour branch, 2021.jpg">Concrete signal post</a>, showing some detail of cables &amp; remains of some lever mechanism or other.
<a href="//commons.wikimedia.org/wiki/User:Collard" title="User:Collard">Lewis Collard</a>
<span class="int-own-work" lang="en">Own work</span>