Interesting possibilities here. In looking at those markings on this blade, they correspond to similar found on the Frankish Ingelrii swords of c.10th c. and contemporary with the Ulfberht blades. While obviously the blade profile and the sword itself is much later, it is known that the Ingelrii blades remained in use longer than those marked Ulfberht, perhaps as late as 12th century. Whatever the case, markings of course as we know continued long after the original maker or context had ceased.
The cross, to me seems very much like the simple Greek cross, and the practice of placing crosses on swords and thier scabbards was also known in the 9th and 10th c.
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