Nice Badek,
The angle of the hilt indicates Javanese style, but the knob on the end of the scabbard and style of decoration points me to Sumatra more then Java. Some of these are attributed to Bugis, Celebes, but those often have a different angle in the hilt.
The Dutch used a hallmark to indicate imported silver, a swan and a letter 'z'. I can't decipher your mark on the scabbard, but there is a possibility it is one of those.
However, Indonesian silver was often unmarked until 1930 were hallmarks became obligated.
Nice badek!, Oh, I already mentioned that
Peter