Questions on Wings and Brevet of New Zealand

[Nichollg]

Hello. I'm a new member and collector of Aircrew Wings, Brevet and badges of Britain, Australia and New Zealand.
Searching for answers, as i have been for sometime on the following questions relating to NZ aircrew.
RNZAF
When were the brevets for Air Enigneer (E), Air Ordanceman (AO), Air Loadmaster (LM), Helicopter Crewman (HC), Flight Steward (FS), Parachute Jump Instructor, Navigator (N), Air Electronics (AE), Pilot (tudor crown),Air Gunner (AG), Air Bomber (B), Observer (O) and Air Signaller (S) introduced
What year were the following ceased: Air Gunner, Air Bomber, Observer, Air Signaller (S)
and does any know about a Pilot wing with NZPAF in the centre?
Army
What year was the pilot wing introduced and creased
RNZN
When were the following introduced: Pilot and observer? and when did the change from british style cuff wing to current style occur?
Thankyou so much for your help
Cheers
Gareth