Joe, darson, bufflehead - sorry I didn't provide any specifics about the three panzer III pics - photos had no captions. The middle wartime photo I would guess is a reworked Ausf F upgunned with the 50mm KwK L42 canon. It could be the quality of reproducton, but the main gun looks a bit bent, perhaps a wooden dummy, which would make it a command tank. The third photo, I agree, most likely another F. Yes, the tracks are backwards - you guys did your homework but can't say as much for the museum curator.
dupes - great progress! Do hope you add some sand/dust weathering on the lowers and crevices & such. At the moment the finish looks at odds with itself. True, vehicles arrived in their panzer grey colour, but unless you are modelling a vehicle that just came off the Tripoli docks (the grey would be much darker) then there should be seen the effects of kicking up dust from such a sun bleached vehicle.
SMJmodeler - my vote would of been for either soft skinned vehicle. I'm not sure if the Stug G saw action in North Africa, but please do enlighten me if it did. There were three Stug Ausf C/D with the special unit Sonder Verband 288. Have also seen a photo of the Ausf F/8 in Tunisia.
Jack