Exhibition catalogue, Die Ritter, Burgenländische Landesausstellung, Burg Güssing, 1990, pp. 135, 201-202, no. 6, pl. XLIV (AG 244).
Illyrian type helmets were originally composed of several riveted sections, the two raised ridges over the crown giving added protection to the weakest part at the join of the two halves. From the 6th Century B.C. onwards these helmets were made in one piece but retained the ridges and incised guidelines of the central join as decorative elements.