One of my embarrassments was the 1964 pay structure. I hadn't paid much attention to it when it was published and one day in 1964 this smart young chap was walking around the squadron and on his arm was a four bladed propellor. The only experience I had had with four bladed propellors was with the Air Training Corps so I congratulated him on his smart new ATC rig.
The somebody told me he was a Junior Technician.