This must have been an LGW diversion.  It is an ex-People Express machine taken in the early 1990's.
<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@N02/16180919162/">Continental B747-200 N605PE at MAN</a>