Well, we are getting closer together.

Vendor's description started off at:
dagger / saber (1) - Iron (wrought) - Second half 19th century
Indonesia
Indonesian dagger/sabre from 19th century with a beautiful drawing on the blade professionally restored.
Uniquely, this object was made by hand by an individual planner (see the irregular decorative points on the blade).
Late 19th-early 20th is OK.