The Austraian Army had a lot of Ford/MH guntractors and other type trucks so those Pictured are not necessarily the NEI ones.
I also would not place 100% faith in the photo captions either as mistakes are made and quite often as well.
cheers
Cliff
EDIT. I blew the pic up as much as I can and I think they are the 1939 barrel nosed Fords. So the date may be correct.