Skippy

The King’s (Tudor) Crown signifying service to the nation and the ‘Royal’ prefix. (note that the badge now bears the Queen’s (St Edward’s) Crown.)
A kangaroo and a wattle wreath as being distinctly Australian.
A boomerang from the TAC Signs of the parent Units.
Crossed .303 rifles representing the Infantry nature of the Regiment.
It was approved as a badge suitable for the Regiment in 1949.
It is proudly referred to, by those of us who earned the right to wear it, as ‘Skippy’.