Encyclopedia of historical weapons - Helm, Great Helm

Helmet surrounding the whole head. Usually consist of 4-5 metal plates riveted together. Worn over a mail or a small steel cap.

Encyclopedia of historical weapons

From Encyclopedia

Barbut
Also called barbute, barbuta. An open-faced shoulder-length Italian helmet, made in one piece, with a T-shaped face…
Brown Bill
See Bill.
Pommel nut
Also pommel bolt or tang nut. Capstan rivet sometimes included in pommels.
Nagan
Sword with a serrated edge; hilt is padded and fitted with a spiked pommel. 
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