I found the photo below captioned "Trucks of the Anti-locust campaign at Rayena Sth Persia" while doing a search using the Pictures Australia website. It shows a similar CMP to above with what appears to be the hood bows for a rag top and no windscreed frame.
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Cheers
Cliff Hutchings
aka MrRoo S.I.R.
"and on the 8th day he made trucks so that man, made on the 7th day, had shelter when woman threw him out for the night"
MrRoo says "TRUCKS ROOLE"