Hi Philippe,
Apparently I didn't notice your questions untill now, sorry for that. No, it is not stamped, it's an Eigentumshelmet, virtually unused. Just let me know if you want any more details.
The unknown whereabouts of the owner in combination with this monument still leave me puzzled. Is he the man in the picture? What are the odds for finding a combination of a LG 100 helmet with a personal monument
with a picture of a LG 100 Grenadier not belonging together?
My best guess is that the family kept his parade helmet, and indeed the owner is the man in the picture..
Best regards,
Marcel