Whetstone Cutlery Vindicator Great Helm Helmet (Silver) This type of helm was generally used during the 13th century. The decorative and functional visor pivots from a single hinge attached at the top of the visor allowing for ease of donning or removing the life-size museum-quality helm. Crafted in steel, this great helm is fashioned like a Sugarloaf Helm, due to its conical skull.