Unknown Sumatra (?) dagger

[Sajen]

Hello,

I want to show you this old supposed sumatran dagger. Handle and sheath are very well patinated and fine carved while the blade is from more poore quality, maybe an older replacement. Is someone able to give a exact origin and a name for this dagger? It is 35 cm inside the sheath, the blade alone is 24 cm. is it maybe a sumatran badik?

Thanks in advance,

Detlef