Can you tell me more abouth this Australian WW1 soldier ?

[Australia]

Found this in mothers garage recently .
Don't know who this man is ,
Can't see anything else to identify him .
(No name on rear)


Can you tell me anything else about him ?

[Ubique]

Breeches and leather leggings suggest a driver?

Oz

[lithgow]

Was there a photographic studio mark on the back as this appears to be a photo studio portrait-no formation flashes or trade/rank badges so this would probably have been done soonish after enlistment-not much to go on unfortunately.