Hi Wolf,
very nice.... a fantastic 'Kaskuba'

.......excellent photography

.
The obvious possibility is a traded / captured blade ....very nice hilt.
I wondered about the 'balance' of the sword ....many seem to have a light-weight hilt/pommel (with thin light blades)....with the longer length of blade / weight this would be a problem ....has the hilt/pommel been weighted to overcome this ?
Wolf this sword deserves a seperate posting
Kind Regards David