David,
I think the cab 12 windscreen was only able to open to 30 degrees (?), so couldn't be driven with the canvas cover on? Hence, the cover was for stationary cammo purposes to prevent the windscreen reflecting at passing aircraft, etc. A cam net was not enough to prevent this: it took a solid cover over the glass to prevent the reflection in such cases, and is the same these days. Heavy hessian is part of the cam stores issued for trucks, to cover the glass and to hang around the lower parts of the vehicle when fully concealed in a static position
The majority by far of Cab 12 vehicles in Australia were Fords, not Chev. Blitz trucks, no matter what make or model, relied almost always on Canadian parts and maintenance publications. (The exceptions appear to have been driver's handbooks, which were produced as Australian military publications). In some instances, the CDN manuals were provided with a 'stick on' Australian cover - this is particularly the case with those issued by the RAAF that were assigned a unique RAAF publication number.
Mike C
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