I think there is alot of truth to what Tyler said in the last thread about this topic.
Your mystery helmet undoubtably has real linneage, but perhaps the restoration and that on top of who knows how many bad castings before you gave your helmet the "close but not quite" look it has?
Whatever the story, what you offer should not be considered a direct copy. More like 4th generation or so.
The only (as of now) known true copy of a real helmet is in Lee's hands.
That is not to say your helmet could have come from a copy of the many unused helmets that we havent really seen up close.
Thats what I think. And dont take offense please8)