UBB.threads Forums Uniform & Accessories Helmet Forum winter camo w/unknown sign

thanks replying guys.
i have sent som e-mails and searched for the symbol.
yeasterday i got a mail frome a guy who said:
he had never seen such marking on a helmet,but the symbol are almost identical with tactical marking for "PAK/ARTILLERI SCHARTENSTAND"Exept that the canon is criss/crossed(removed)he had seen several maps frome the easternfront were destroyed bunkers were marked like this.
he is pretty sure that this helmet has belonged to a man in a pionercompany"Bunkersturmtruppe"(destroying bunkers)he had not heard of any norwegians in such a company.but he was pretty sure it was frome the easternfront.
i also post a pic he made for me.
if someone have more to add,please tell me.
erik