Thank you for all these details.
I read the description of the auction house. It is specified that keris is from the collection of Emile Andrée (1871 - 1933), a "famous" french Art Nouveau architect from the city of Nancy. I found on internet that has traveled widely between 1894 and 1900 in Sicily, Tunisia, Egypt, Persia and Sri Lanka (but I don't find indications about travel in Indonesia).