Hey Ron,
If all the helemts of WWI were saved, they would be worth about as much as Vopo helmets are now. It is like finding a rare Mauser rifle wht was sporterized by the man who brought it home, it is truely sad to see, but at the time, it had very little value as a collector's item, but the man who cut it off to hunt deer to feed his family found value in it as a sporter.
Best
Gus