<p>Many trains at the 1990 Morden depot open day
</p><p>Left to right:
1973 Piccadilly line tube stock train in an experimental livery
</p><p>Probably Northern line 1972 tube stock train in an experimental livery
</p><p>Northern line 1959 tube stock
</p>
Probably Northern line 1972 tube stock train in an experimental livery
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/47739225@N08">citytransportinfo</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/citytransportinfo/51558228462/">1990MordenDepotOpenDay3</a>