Sorry to be a bore but we are dealing with the mid-1950s, hence it's the 1951 Trade Structure we're talking about.
All trades (where appropriate) aircraftpeople 1st & 2nd class, leading and senior aircraftpeople
Technical Trades:
Junior Tech - one upside down chevron (actually in heraldry it's the right way up but lets leave that alone!!).
Cpl Tech - two upside down chevrons
Senior Tech - three upside down chevrons
Chief Tech - three upside down chevrons and a crown - yes a CROWN above
Master Tech
Non-Tech Trades:
Cpl - two stripes
Sgt - three stripes
Flight Sgt - three stripes and a crown
Warrant Officer
Come 1 Apr 64 and its all change (again).
a. Get rid of Cpl Tech and Senior Tech
b. Turn everyones stripes up the same way
c. Limit rank titles to Junior Tech (with new 4 blade propeller badge) Cpl, Sgt, Chief Tech (with 4 bladed prop instead of crown), Flt Sgt & Warrant Officer
List One (Tech trades) go J/T cpl, sgt, Chf Tech, Flt Sgt, WO
List Two (Non Tech) go cpl, sgt, F/Sgt, WO
If you want a real bol*^:k cruncher - there were some guys who went 'technical' in 1951 and in 1964 their trade changed and they were stuck as Chief Techs and not moved to F/Sgt.
Lastly, get rid of Aircraftman/woman 2nd and 1st class and just have aircraftman/woman. Leading and Senior aircraftman/woman essentially unchanged in '64
That's it - we can do the 1946 non-commissioned aircrew structure, if you want but I'm off to the pub.
Old Duffer