Unknown sword, help needed!

[Sajen]

Have received the sword and I am very pleased with it. The "ferrule" is actually from horn, like Ian suggested I think both horn pieces are from goat horn. The ferrule was once broken and I think tribal repaird with resin. The wooden part is indeed from bamboo like I thought and have received a very nice dark patina. The upper horn piece is secured with one or two bamboo pins. The very well used blade is stained black by plant brew (I think) and on both sides hollow ground under the spine and very well worked. Here some pictures, sorry for the quality, it was a dark day.

[Sajen]

Here a picture together with other sword from the area with similar blade style for comparison, from up to down: a topo from Flores, a rugi from Alor, a pade from Ceram or Sulawesi and a semarang from Halmahera.