I am not sure how relevant this is but compere the "club" with the spear halft. The other side of the spears is rounded I imagine because the wood on this side is inpregnated with the pithy heart wood as can be seen in the link.
http://www.vikingsword.com/vb/showthread.php?t=7284
Also there is some relation to the club from the New Zealand museum link in the earlier reply. If you ignore the difference in handle both clubs are truncated pure froms.