- Pzkpfw-e
I can't remember. I saw it in London, many years ago and I think the engine as visible through the holes made by the Cromwell that knocked it out.
Three of the holes enter the fighting compartment, which is well lit from the cutaway armor on the other side. ISTR a single hole at the far right rear of the vehicle that didn't reveal much with available light (it was back in the shadows of the 2nd floor walkway as well). Maybe if someone got a flash in there. I did manage a flash through a fighting compartment hole, so I reckon that found the view in the rear to be not worth it (meaning, nothing of interest was visible from outside).