Ronny,
Thanks for the comparison of the spikes. I have always felt that there was something not quite right with the spike on the first Pickelhaube I ever had, a 1915 model refurbished by L.I.A. XVIII. It looks like peak and neck-guard had been replaced by Vulkanfiber ones but slightly misaligned, which I blamed for the impression I got about the spike.
The comparison picture prompted me to unscrew that spike and another M1915 one, and take the following picture. The difference isn't as pronounced though :-k