Keris for consideration

[Gustav]

Sheath and hilt cup are recent work, hilt could be antique.

Blade could be old or recent. It looks like an older South Sulawesi or more likely Sumbawa blade, but there is at least one detail which isn't right with the Gonjo for Keris with this provenance and age.
If the blade is old, Gonjo looks like a relatively recent replacement.