"Buginees 'Executioners' Keris" for comment

[Atlantia]

These have been sat in a collection for years.
Whether the collector (who lived out there) had the sheath made or bought the blade in this configuration with a recently (at that time) made sheath I don't know, but he seems to have preserved many items in exactly 'as found by him' condition.
Usually he seems to have either just heavily greased them or varnished the blades.