Squadron crest of No. 102 Squadron, Royal Air Force.
RAF
RAF website <a rel="nofollow" class="external autonumber" href="http://www.raf.mod.uk/bombercommand/h102.html">[1]</a>, photo <a rel="nofollow" class="external autonumber" href="http://www.raf.mod.uk/bombercommand/images/102sqncrst.gif">[2]</a>