Hello Kai,
in this thread:
http://www.vikingsword.com/vb/showth...ight=WWII+kris (post #20) is a old picture with a "upside down" scabbard and here:
http://www.vikingsword.com/vb/showth...ighlight=kalis are shown two old blades with later replacement scabbards in the same fashion. Actually is a WWII or later kris listed by ebay with a "upside down" scabbard, Will post pictures when the auction is ended. I've seen some more in the last years but unfortunately I haven't saved the pictures.
Regards,
Detlef