First off, the Totenkopf on this helmet is the fake that has been appearing on de-bay over the last year or so. I was recently ripped-off and bought one of these. the photo on the de-bay auction was blurrly and I thought I saw original features.
The fakes have one poorly-defined hole for the nose and are poorly finished around the entire circumference. Originals have two holes for the nose and are better quality overall. I am still looking for an original Braunschweig pattern.
Plus, even if this helmet existed (which it did not) that skull is the private-purchase patterm which would never be on a M15 helmet.
I am still looking for an original Braunschweig pattern Totenkopf, but all I have is this fake mocking me..........
Chip has indicated that there was at least a prototype of a Haube with a skull on it for officers of the Flammenwerfer detachment of the 5.(Rohr) Sturm Bataillon (read officer's Garde eagle Wappen) , but beyond one published article about it (never seen it) I have seen no information, no proof of this.