Helm is a word of origin Germanic helm, part of the armor that protects the head and the face of the Warrior so the helmet of Mambrino, is refers to a helmet of gold and the name of Mambrino would proceed of the writer Italian of novels of cavalry called Mambrino Roseo, in the novel the helmet of Mambrino was a helmet of gold that belonged to the King moro Mambrino and to the put is it it was invulnerable