My first thought is that the castings are either by Phoenix Model Developments, or by Sanderson. Phoenix definitely had a series in its 54mm catalog, depicting a Viking raid on Lindisfarne in 793. I don't recall, however, if that series included any women or if it was just the Vikings and the monks of the priory. On the other hand, I don't know offhand whether Sanderson ever produced any Vikings, but he definitely produced female figures like this one in his Roman series and his "Pirates of Tortuga" series.
That's my educated guess, in any case. I'll be on the road till late this evening, so I won't be able to check my references till then.
Hope that helps, prosit!
Brad