I think that the camouflage of the helmet and guns (MG or artillery) is different. On guns, we do not often see, even never, black lines to separate the differents colours.What an odd camo job on the last one! The regulations issued by the germans that I've seen for painting the steel helmets mandated separating the colors from each other by the black lines, *in the style currently seen on Machine Guns and Artillery*, and every camo job on waterjackets I've seen is the same style. Yours is very different though, and each camo job is unique that I've seen so far! Where did you get that? The colors look right, is it a late 1918 job?
Some originals post cards of my collection:
My MG in black and white picture
And some pictures now of my camo mg in colour
Best regards
david