Just my thoughts. The blade on here strongly reminds me of the blades on Aceh peudeueng peusangan( aka sikin peusangan, sikin pasagan ). Compare these two
Of course the handle is very different. I would like to hear if others see the resemblance in the blade or not
The hilt does have some resemblance to a hulu tapa guda. You can see on on D. Buttins site here :
http://old.blades.free.fr/pics/picsw...ang/kle03p.jpg
And the tulip bud is a common motif in Aceh art, many of the other carvings shown also resemble motifs and designs seen in "Hands of Time - Crafts of Aceh" by Barbara Leigh. Of course there are many other places in the region that use similar designs. That being said I think there is a strong case to be made for it being an Aceh sword