Great helme, and very complete. A great find! Regarding the support disc issue, if there is a difference in the colour of the inside of the shell ie some shadow of the disc, a lighter area then it has been moved . However, if the colour of the interior is totally uniform then it is what it is. This makes no sense to have the disc on the outside, it does not provide any more protection either way. Besides, this disc was never a protection piece, it provided support, nothing else. Sticking the disc on the interior or outside provides no more protection. It also does not speed up production of the helmet. Regarding POW construction...you think the Germans had no quality control over their workers? Yes we know the whole WW2 story about slave labour resistance moves BUT this disc is just too obvious on the assembly line. We are not talking subtle sabotage here. I would also look at the prongs on the spike base split brads. All of the untouched helmets that I have seen have the prongs bent right back close to the disc.There are no scratches in the paint of the support disc. It was done cleanly by some sort of press/punch mechanism. I have removed hundreds of brads from spike bases in my years of restoration. When I put them back and spread the prongs it is extremely difficult to get the prongs close to that disc. It was originally done by machine. In the end however, This is a beautiful example of the Hessen round spike base M15 helme complete with original kokarde and chin strap. Very very rare...a collectors dream.