A photograph of a Western Electric AK1 relay.  AK series relays are actually two relays in one mounting, so there are two coils and two armatures.
Duncan Smith <a href="//commons.wikimedia.org/w/index.php?title=User:Slimey.limey&amp;action=edit&amp;redlink=1" class="new" title="User:Slimey.limey (page does not exist)">Slimey.limey</a>
2007-03-25
<span class="int-own-work" lang="en">Own work</span>