A Sikin Panjang...or not???

[CharlesS]

This is a recent acquistion for me and rather an oddball. At first glance it appears to be a N. Sumatran sikin panjang with a variant hilt that seems to combine two hulu styles. However, based on the very precise definition and description of a sikin panjang by Zonneveld this sword would not technically classify as one because of its blade.

The blade has an almost yataghan form with a scabbard clearly made for it. The sword fits oddly into the scabbard at the top, but patina indicates it has fit in that position for a very long time, and again, the scabbard is clearly made for the down curving blade.

Is there a more precise terminology for this sword???

Also, can anyone translate the inscription on the back of the scabbard?

Thanks in advance for any input.