D John, Im not sure of this, will try to ask some vets who might know, but I do seem to remember some aircrew with the Kings Crown on F/E wings, on both Lancs and North Stars. Just as a note, many of the WW2 vets didnt switch even when ordered to do so, when forced to change many wore their WW2 wings out of sight behind the lapels on their uniforms, a practise which continued with the imposition of unification of the forces, when the new wings looked like something out of a cornflakes box, another example of bloody stupidity by our then PM, but I was long gone by this time.