The reason it sat so long at that site (with a low price) was because the helmet falls way short of what is considered the "norm" in SS helmets. 5 years ago no one heard of this variant but has recently decided to make its debut it seems recently.
I do know there are some respected collectors that believe in this variant just as there's some that don't. This is a piece where there's going to be a divide in consenses among helmet collectors. I am looking foward to any future evidence to support these decals however.