Inspired by the effigy of Niccolò Benedetti (1405) I'm working on a great helm, that I personally believe designed to be used on foot. The fact that we can see the edge of the breastplate under the great helm suggests the fact that there is no aventail, and therefore no bascinet under the great helm. Here are some pictures of the helm in progress. The material is mild steel, and the thickness of the skull is 4 mm. The face plate is also 4 mm, with the edges forged down to 2 mm. And finally the backplate is 2 mm thick. Everything has been forged using a coal forge.