Terrific acquisition Harry! I would leave it as-is also. It will display quite nicely. Oradour, thank you for sharing the knowledge about the chinstraps being recycled from pickelhauben. Now I understand why I see so many sans chinstraps. I suppose this only applies to EM chinstraps? Otherwise, officers scaled chinstraps would look incongruous on an M16.
I like what the lady said about all WWI German helmets being black. I have run into many sellers like this one in my day. Stubbornly defending some strange idea about what is original and probably obtaining the "knowledge" from some old movie or the rumor mill.