Nick thanks for the reply on the hats. Certainly a thing I must watch out for in future. Also thanks for the photo of the concrete mixer.
Here's another AWM photo showing RAAF bulldozers at work building an airfield. Titled "
NADZAB, NEW GUINEA. C. 1944-02. BULLDOZERS OF NO. 62 MOBILE WORKS SQUADRON RAAF"
cheers
Cliff