Its Norse. It's called Aegishjalmr or in English "The helm of Awe". You would typically see it painted or tattooed on the forehead of a warrior before battle and adorned on shields, armour and weapons. Charles Mansons swastika, was ideally situated for the Helm of Awe. Whether he got the two mixed up I'm not sure of. Quote about the helm from the Edda: An ægishjálm I bore up before all folk… so that none dared come near me, and of no weapon was I afraid, nor had I ever seen so many men before me, and yet deemed myself stronger than them all; for all men were greatly afraid of me. I've considered it as a tattoo. Not on my head, probably my right arm/shoulder area.