A bit late to the game but I thought I'd share my two Australian slouch hats from my RAAF collection.
First is a 1944 dated true RAAF hat with the 4 vents per side, no side clip and the removeable sweat band.
My 1952 dated post war hat of a more typical design than my RAAF specific hat. The RAAF flash came with the hat, not sure if original to the hat.
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