Aviaco and Iberia used to interchange their charter operations.  Here is IB operating the AO charter to PMI.  A couple of BA 1-11s sit behind IB.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/130275500@N02">G B_NZ</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/130275500@N02/23466074303/">Iberia DC-9-30 EC-BIK at BHX</a>