are you able to provide any further identifying information such as parent names, siblings, wife occupation etc.
Will help the listers with your query.
Edit to add:
Is this him?
ONEAL ROBERT WILLIAM
Service Number - TX3142
Date of birth - 08 Oct 1906
Place of birth - BRUNY ISLAND TAS
Place of enlistment - LAUNCESTON TAS
Next of Kin - O'NEAL CLARICE
This is an undigitised WW2 Document and you would have to apply to obtain the information from National Archives Australia website.