Rare early I believe to be Furry 400 helmet, no markings on it but everything I’ve researched and have been educated on points at a Fury 400. It is Fiberglass with no major damage or flaws only light signs of use. It is in amazing shape, inside and out. 100% usable as is. It measures approximately 52-54cm head size. So today a size xtra small but back then probably around a size “small”
A great addition to your collection or to use!