<p>Program selector switch legend: four BBC national stations, GMR (BBC local radio), PICC (commercial local), Radio 3 on Medium Wave, Radio 4 on Long Wave, and the local desk output.
</p>
Glensound Electronics radio sound mixer, from BBC Manchester.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/30661871@N03">Richard Ash</a>
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/30661871@N03/45807921614/">IMG_5675</a>