(a) These are winged spears, though with small wings - the width across the wings is less than the width across the widest part of the blade. They have ornamented butt pieces.
(b) The shafts taper towards the blade, by about 10%.
(c) There is some kind of strap over the spears, just above where they are being held, which continues over the right shoulder. Stephenson clearly shows that this is a continuous strap.
I think that (c) is very curious, so I looked for more pictures of this. A different drawing is given in Hauck, Karl (1982) “Germania-Texte im Spiegel mittelalterlicher Bildzeugnisse des Nordens,” in G.Wirth (ed.), Romanitas-Christianitas: Festschrift Johannes Straub, de Gruyter, Berlin, 175–216. A drawing based on the drawing by Hauck is also given by M. P. Speidel, Ancient Germanic warriors: Warrior styles from Trajan’s Column to Icelandic sagas, Routledge, London (2004).
Hauck and Speidel draw the "strap" as possibly the neckline of the mail shirt, coincident with some kind of ornamental ring on the spear shafts. The "neckline" doesn't continue on the other side of the shaft, and it seems so be a rather low-cut mail shirt if it's a neckline. However, apart from the "neckline" meeting the spear shaft at the "ring", there is no indication they are joined. Stephenson, OTOH, shows them clearly joined, with continuous decoration from the "ring" to the "neckline" (especially on the right-hand warrior).
Hauck and Speidel also draw the shafts with no taper that I can measure.
Is there a good source for a definitive picture of this? Arwidsson, Valsgärde 7, would seem like a good place to look, but my library doesn't have one at hand. Is there a good picture of this panel in Arwidsson or elsewhere?
Does anybody have any thoughts on this strap/ring thing?


Valsgärde 7 warriors with spears
© 2004 M. P. Speidel


Valsgärde 7 warriors with spears (Hauk)
© 1982 Walter de Gruyter & Co.


Valsgärde 7 warriors with spears
© 2007 I. P. Stephenson