Umbo discovered in the same context as the Mondelange spear. This object is made up of an ovoid shell, with rectangular fins pierced with holes. Small rivets were used to maintain the umbo on the surface of the shield. The shape of this piece is typical of the Tène C2 (180-130 BC). Deliberately folded, this umbo probably played a symbolic and ritual role in the burial of the deceased. This type of degradation is part of a context of sacrificial breaking of weapons observed, at this time, in sanctuaries and tombs.