Thanks guys , it was pure guess work from me based on the link/photo in post #3 .
"Regimental Badges Cap and Shoulders, worn by Russell Smith, Armoured Corp Training Centre."
"So they sent me to this armoured corps training centre to learn to be an instructor in weapons and tank gunnery and small weapons and so on. And I did extremely well there because I was young and interested. They made application for me to be transferred to them as an instructor."
Sorry for the misinformation.
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