The third of Bob's pics is closest to a WW2 type. The first one is a 1959 pattern Aust Army edition.
http://oldcmp.net/Images/canvas/bandiaccess-4.jpg
This was fitted to a late production RAAF CMP.
Here's a different Aust WW2 pattern with a 1959 one for comparison:
http://oldcmp.net/Images/canvas/eucanvas.jpg
Yet another type on a C15
http://oldcmp.net/Images/Chevs/C15A/C15asunshine.jpg
And an Australian pattern 6 seat utility:
http://oldcmp.net/Images/official_pi...tility/top.jpg