Tombak spearhead

[Pieje]

I bought this tombak spearhead out of curiosity (29 cm).
Was mounted on a simple wooden stick (total length ca. 150 cm).

Not my region of interest, but I did some homework.
Could be Javanese?
The oxidation of the wooden scabbard makes me think of 19th century.
The blade, btw very thick at its base, seems older?

Any corrections or additional info is highly appreciated!