Thank you for the image, Lee. There is also a nice example with similar corrosion found in Normandy (s. Fig. 11 and 13):
https://books.openedition.org/purh/17465
A contemporary depiction of a sword with that sort of wheel pommel can be found at the tomb of Heinrich der Löwe / Henry the Lion in the cathedrale of Brunswick. The monument likely was build shortly after his dead in 1195 (although some historians date it a few decades later, but there is strong evidence of an early origin).
Inspired by Lee´s sword, I attached a (removable) grip to give it back a bit of its originally appearance. Atteched an image.
Best regards
Andreas