Just to add to my earlier post, after a closer look on a bigger screen.
The commander is also wearing a shirt, not a jacket. I saw the Officers issue belt, and concluded that he was thus wearing a jacket.
The commander and driver are wearing the early M38 Field Cap, which remained popular with panzer crews, because it didn't have a peak, which was awkward in the cramped convines of a tank. The only issue is that the Soutache is to big. The gunner and loader are wearing the M41 DAK field cap, as noted by the two air holes at the side of the crown, and the lack of one or two buttons to the front. To make them into regular issue for Western or Eastern Front troops, the holes need to be removed, and one or two buttons added just above the peak. The peak also looks a bit to big for a regular issue Field Cap, but that is hard to judge from the photos.