Hi Guys,
well, I got the helmet, and sorry to say, the stamp is not that great, all I've made out in the circular stamp is (Riemenfabrik) (AKT.) (Ges) 1913 dated and Neu-Isenburg, I'm still working on it, to the left of that stamp is a blurred name and what looks like (Donau) and 125, inside on...