<p>c/n 122-40196.
Actual US military serial 44-73656.
Despite being delivered to the UK in 1945, this Mustang didn't see any active service and instead returned to the US. It remained in USAF serivce with various Air National Guard units until demobbed in 1958. After a period of civil operation, it was reworked by Cavalier Aircraft and in 1968 it joined the Fuerza Aerea Salvadoreña (El Salvador Air Force) who operated it as '406' until 1974. 
Painted in the colours of the 352FG based at Bodney during 1944, she was a well known warbird in the US, however she was sold to France in early 2013 and is seen getting airborne to display at the 2015 Flying Legends airshow.
Duxford, UK.
</p>
12-7-2015
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/65001151@N03">Alan Wilson</a> from Stilton, Peterborough, Cambs, UK
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/ajw1970/19023548743/">North American P-51D Mustang '414237 / HO-W' 'Moonbeam McSwine' (F-AZXS)</a>