Trent
Interesting. The prop doesn't look like a current day image of a staggering prop based on curvature. However, if you imagine the the prop plane and parallel that to the leading edge of the lower wing it does seem to be advanced compared to the upper wing.
VH-UYI C/n 129 , c17B was first registered in June 1937 but crashed at Brisbane on the 21 st May 1941 according to a book I have.
VH-uxp c/n 108 c17b first registered in 1937 , operated with the RAAF as A39-3 during the war, returned to the civil register 1952.
No other stagger wings mentioned in the time frame of '30's
Your use of the term imported noted.