Ca. 800 - 1100 AD. Rare medieval four-plate iron helmet with nose guard intacted ; formed of triangular sections; attached with iron rivets passing through this overlap to secure them in position; the rivets worked flat into the surface of the helmet, almost invisible from the outside but detectable on the inner surface; the inverted lower rim furnished with an additional series of rivets, probably to accommodate a lining; the plate-junction at the apex with loop, allowing a plume or horsehair streamer to be inserted, or a conical covering plate to be attached.Good Condition with some restoration and reinforced inner part; Size 290mm/ID223x202mm ( 11.41in, 8.77in, 7.95in) ; 1900gr; Provenance: Property of a professional London art expert; obtained from an old British collection formed in the 1970s. The item comes with Professional Certificate of Authenticity, Scientific report written by Dr. Ivan Bonchev, Phd, University of Oxford and Art Loss Register Certificate.