Steve,
The other one that I have seen is owned by a french collector (with M91 stars, so 1 and 2B).
Now, with your 3 helmets and the one of Jager, I know 6 EM LGR 8 Pickelhauben, included mine. 4 with M91 stars and 2 with M91 horns.
Concerning my own helmet, it is showing following particularities:
1) It also has on the other side of neckguard a regiment stamp of the GR12 which was the brother regiment of the LGR8, same garrison of Frankfurt / Oder.
View attachment 36972
It says: 2 (Brandenburgisches) Gr(renadier) 12.
The GR12 may had some urgent needs of such helmets with this new wide Grenadier eagle, maybe for parades or for official guard duties, shortly before war. So a few helmets could have been rent from the LGR8, not a big thing, because same garrison. Let´s remember: the LGR8 was allowed to wear this Wappen since the 15.6.98. The GR12 was allowed to do that pretty lately, the 16.6.1913. As we will see, this helmet was returned to the LGR8 shortly before mobilization of August 1914.
2) There is in the helmet shell the name of the first wearer after the mobilization: Karl Jäckel. This guy is tracked and traced, was at the 4/LGR8 (IB). He has been seriously wounded on the 14.11.14 near the river Aisne and died a few days later.
View attachment 36973
des.genealogy.net
des.genealogy.net
3) His helmet was then sent back to the LGR8 Ersatz-Bataillon and given to another man who also wrote his name and company in the helmet shell: Unteroffizier Berg, 11/Leib. (IIIB). He first crossed out the name of Jäckel.
View attachment 36974
View attachment 36975
Unteroffizier Richard Berg has also been tracked and traced. He was mobilized at the 6/LGR8 (IIB) ans was wounded during the first weeks of the war:
des.genealogy.net
After his recovery, he came back to the Ersatz-Bataillon of the LGR8 and this helmet was given to him.
We also have a I/LGR8 helmet that has been shortly worn in the GR12 before the war, then first worn during the war in the I/LGR8 (4. Company), then given to a guy which came from the 6/LGR8 (IIB) and moved to the 11/LGR8 (IIIB).
Two Grenadier Regiments and three bataillons for the one and same helmet.
Richard Berg was taken prisoner on the 26.9.15 near Maison de Champagne:
des.genealogy.net
des.genealogy.net
View attachment 36976
Philippe