Ok, I'm tired of beating around the bush- Lets figure this thing out once and for all!
My "Mystery" helmet pattern was derived from something Tyler here calls the "Lava helmet" seen below-
I got my copy in either 2000 - 2001 from an eBay seller named KBoyette who told me her boyfriend worked in the FX industry and had got this helmet years before that.
For years, I thought this was one of ten kits that were made by Don Post employees for themselves while they had an original film used helmet for laser scanning, but Tyler here tells me that story was all a fan myth of sorts, so we're back to square one and the Mystery helmet is more mysterious than ever.
If my Lava helmet isn't the exact same one in the photo, it's at the very least out of the same mold. Everything was the same- the seam going down the center through the forehead arrows, the bad glasswork, the crappy texture, everything.
Post what you know, and let's solve this thing once and for all!