It is not a brooch. It is an official RAF pilot's brevet as designed to be worn by a qualified RAF pilot on his/her No.5 mess kit jacket.
I was awarded my wings in 1962 after two years of bloody hard work and I wore them proudly on my various RAF uniforms until I left the RAF in 1979. I never wore them again but wore other employers' wings as appropriate for the next 26 years.
I really object to seeing someone wearing RAF wings when they are not entitled.
I simply cannot understand how you can refer to them as a brooch. You have let yourself down badly in my estimation.