Oooohh! Nice examples Chas, and your photography is incredible.
Let's see....
Bayerisches (Bavarian) Officer's Pickelhaube
Model 1896/1914 Bayerisches (Bavarian) Mannschaften (Other Ranks) Pickelhaube for
7 Feldartill. - Regt. Prinz-Regent Luitpold, München, I. Armee-Korps.
Near-issued condition Model 1896 Bayerisches Sanitäts-Abteilung Mannschaften Pickelhaube
Ersatz Model 1915 Bayern Infantry Tin Mannschaften Pickelhaube
Ersatz Model 1895 Bayern (Bavaria) Filzhelme (felt helmet).
Model 1915 Bayern (Bavarian) Mannschaften (Other Ranks) mounted-troops Pickelhaube
Have another, but I'm saving it for an update.