I found out that the scabbard marking is ...
"CW" = 1900: Constructie Werkplaatsen Artillerie, Delft (NL)
Leather scabbards were marked by makers ...a scabbard that was damaged would have been returned to the manufacture for repair.
The crown and
W suggests that the blade was made 1914 (or 1906-1914

)
Before 1905: J
1905: M
1914: W
1915: X
1915/16: Y
1916: Z
I cant work out whether this was Dutch Army or KNIL. I think the scabbard is correct for KNIL . Other than the brass plate there are no serial numbers ...does this suggest KNIL ...rather than infantry ?
David
Just discovered the crown and W are inspection marks...
Crown-W : Wiersma - apparently succeeded O (crown-O ended 1898 )and was active through WW1.