My source claims that CWOs used the current crown in wreath from 1958. They might be wrong though so interested in anything stating the former AWO badge was used by cadets.
Separate question: Did the ATC actually have the rank of CWO pre-1958? My source states that ADCC did not have the ranks of FS or CWO contrary to the OPs presentation slide. Again the source could be wrong so would love to find out more.
I posted the chart below a good while ago in another thread. However, it shows clearly that many of the pre PTS ATC badges had an origin in the RAF Boy Entrant/Apprentice dress regs - DofE etc.
Looking at it again I see they also had the rank of Warrant Officer Boy. My source says that ATC rank chevrons were originally those as used by the RAF Apprentices so I wonder if they also used their WO badge?
MB