Are you referring to the vision port hatches or are you talking about the trasmission access panels on the front slope of the tank? I don't see overhead personnel hatches on the hull of a Panzer III. I come up empty on my New Vanguard Pzr III book, S/S Pzr III in Action book, but my S/S StuG III Ausf G Walk Around does show good shots of the transmission access hatches and engine hatch interiors.