Forget those other 2, don't think the case looks long enough for the Kromar nor the Schonberger, both of which would be very rare in Australia anyway. I'm betting on something much more common here, 9mm Glisenti Auto, adopted by Italy in 1910. Barring measurement knocking that off, of course.
Edit: Nope, not happy with the case type. Bottle neck "C" case doesn't really suit the Glisenti, will have to wait for accurate measurement