Welcome to our conundrum... That is exactly what Tyler and I have been asking each other all day. HOW could it have all the details on the dome but NONE od the details on the rest of the helmet? It almost seems like a combo of two helmets (which, no I am NOT suggesting).
It took me a couple of times reading that to work out what you were saying.
So there's details there on the dome from damage from after filming
there's details missing below the dome that were there during filming
that just doesn't make sense....how, (without time displacement ) could that have happened?