Special Services Batallion

[Tony B]

Hello all,
I'm looking for some help. In simple terms I understand that this Battalion was established during the Great Depression to help youth by training them with military fitness and various trades to enable them be employed by the Dept. of Labour and Welfare.
What uniforms were they issued?
Did they wear caps or berets?
On the attached doco. what does A/Sgt stand for (I get the Sgt part)?
Also what insignia was issued?

Any and all help appreciated.
Tony