Bottom edge of the helmet is pierced with holes to facilitate securing a leather or linen liner. The same is true for the neck guard and the cheek guards.
The bowl is decorated with a pair of 'eyes' at the front and a large crescent (moon) above the ear hole.
This helmet is fitted with a high crest of a flat sheet of metal, shaped like a dorsal fin.
References:
Southern, P. & Dixon, K.R. (2000, Pbk), "The Late Roman Army, (Batsford), p.92, Fig.10
Thomas, E.B. in Klumbach, H. (Ed), (1973), "Spätrömische Gardehelme", (Munich, C.H. Beck'sche Verlag), p.108-9, Figs. 54-56, 57, 4-6; Abb.27.
Vogt, M. (2006), "Spangenhelme", Kataloge Vor- und Frühgeschichtliche Altentümer, Band 39, p.294