Hello Séverin,
There seems to have been some flux between North coast and eastern Jawa (no wonder considering the trade).
It looks like there was some resin narrowing the scabbard (now mostly crumbled away)? If so, the blade may have been married to the scabbard for quite some time already. The hilt could use a ferrule/selut and possibly a slightly smaller eastern mendak. I believe the ensemble could live happily ever after...
Regards,
Kai