W (neck guard), 176mm; W (earguard to earguard), 192mm; H (to earguard), 160mm, 148mm; W (browband), 47mm; D (the cheekguard medallion), 21:45mm; L (snake), 167mm; (crown plate - i.e. the concave square on the crown) L, 93:91mm.
The find consists of a number of pieces from the helmet. These include the neck guard, two ear protectors, the browband, a crestpiece, two 'snakes' and two medallions. The helmet as shown in the museum is displayed on a modern iron core.
At the top, the browband is decorated with a series of features resembling the ovolo frieze on samian pottery. Beneath this, bounded by two wavy lines, is a series of waves arranged on either side of a small vertical central panel. Again, this panel is sandwiched between two wavy lines. Within are three almost circular shapes, arranged so as to overlap slightly. These have a segment missing at the apex in each case.
At the rear of the helmet, in the occipital region, is a panel. The top edge is scalloped and bounded by a decorative band. In the centre of the panel there is a laurel wreath, with a small rosette in the centre. This is tied with a ribbon at the base. Beneath this is a thunderbolt shape.
The two snake shapes fit either side of the helmet skull. These have engraved scales on the body, together with realistically modelled heads.
The top frame has four arms, which meet at a central plate. This last is square is shape, with concave sides. In the centre of this plate there is a medallion of the same design as that seen (and presumed to be attached) on the cheek guards, surrounded by a further roped border. The front and rear arms of the frame have a raised, beaded central line.
The two medallions contain, in the centre done in repoussée, a swirling form, bordered by a corded line. The outside border consists of a series of sections, divided by raised lines.
This helmet is described (though not photographed) in the Robinson book. There is a drawing (Picture 1, based on Lipperheide), which shows several differences from the helmet described in detail by Raddatz (Pictures 2-4). Clearly the drawing does not represent the helmet as it is now displayed. There are three major differences: (a) the shape of the diadem across the brow is slightly different, (b) the medallions on the cheek guards are not included and (c) the 'snakes' on either side of the helmet have been omitted.
References:
Robinson, H.R. (1975), "The Armour of Imperial Rome", (Arms & Armour Press), p.103, No.295-6
Raddatz, K. (1987), "Der Thorsberger Moorfund Katalog, Teile von Waffen und Pferdgeschirr, sonstige Fundstucke aus Metall und Glas, Ton- und Holzgefasse, Steingeräte". p.57. No.400, & Taf.86; 87, 1; 88
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