Looking more closely at the photos it seems that the ambulance Penguin II had its outer front windows hinged so that they open sideways toward the centre of the vehicle but on the non ambulance version all three front windows just open upwards. A handy recognition point. I wonder why they didn't put stretcher hatches in the back, either side of the radiator grille, it looks like there was enough room but maybe the fuel tanks are in the rear corners or something like that.
David
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