Yes Alan, I have had similar thoughts regarding the possible origin. The hilt and sheath have some resemblance to this somewhat misused ensemble:
http://www.vikingsword.com/vb/showth...=polish+museum
(By the way, the very broad Pelet Kendhit on both hilts looks almost identical.)
I think, Bernet Kempers took these pictures in the old Koninklijk Bataviaasch Genootschap Museum. One of the objets depicted in other photos is the sheath from van der Hoop, page 289, b).