I recall that the 'low dome' brass buttons were replaced by the 'high dome' staybright versions in around 1969?
Before then it was button sticks and picking the Brasso gunk out of the crowns with a matchstick at RAFC Cranwell.
'Kings' crowns' were still seen in the 70s, but not many since. Tradition certainly allowed 'hereditary' wings to be worn on flying suits.
There was still the odd 'flying O' (to give it it's polite name) on some navigators' uniforms when I joined. And, SASless, that was long after we started putting the bullets in the blunt end of guns, rather than using ye goode olde ramrods!