I USED TO SEE QUITE A FEW OF THESE TYPE OF DAGGERS THE ORIGINAL HANDLE WAS PROBABLY THE DEER FOOT THAT YOU HAVE IN THE PICTURE. I DON'T KNOW WHY THESE WERE USED FOR HANDLES AS THEY WOULD BE SURE TO LOOSE THE HAIR IF USED MUCH OVER A LONG PERIOD.THE WOOD HANDLE THAT WAS ON IT LOOKED LIKE AN ICE PICK HANDLE NOT MUCH TELLING HOW THAT CAME ABOUT. THE DEER FOOT MAY BE FOR LUCK OR A HUNTING TROPHY ORIGINALLY IN THAT PART OF THE WORLD.
AS TO THE SCABBARD PERHAPS IT SLID DOWN INTO A BELT AND THE WIDENED TOP PART KEPT IT FROM FALLING ALL THE WAY THRU. JUST MY GUESS