My father was in the Royal Observer Corps and wore wings. I was giving a presentation to his Group on my war role as a Military Scientific Adviser and what I did with the information they supplied, At the end, I mentioned Dad was hiding at the back and, tongue in cheek, suggested that he might want to buy me a drink as he was incorrectly dressed since we was wearing wings with a Queen's Crown and his should have had a King's Crown. I got away with it, in fact I think he might have been a bit proud of his lad, who was a member of the horfficer class, whereas he was of the generation where you could be a pilot without having rings on your sleeve.