A stress level testing machine in Wigan Market, it looks like it's from when it was built in the late 1980s. It charges 20p per test but was unplugged and probably unused for some time.
<a href="//commons.wikimedia.org/wiki/User:Voello" class="mw-redirect" title="User:Voello">Voello</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>