A russet iron samurai helmet with small standing rivetsEdo period, 17th-18th centurySigned: Saotome Iechika A russet iron (tetsu sabiji) sixty-two plate kabuto, each mounted with twenty-five small tapered standing rivets (ko-boshi) of decreasing size; the front plate, larger than the others, is fitted with two lines of rivets, while the rear one is left empty, for a total of 1.550 rivets.The typical "Saotome-byo" is visible under this lining, an extra rivet which is almost an additional signature of the Saotome armorers.The five-stage shikoro (neck protection) is in blue-laced...