Interesting! How long is the blade, Michael?
Blade does look Sumatran, and it doesn't look artificially aged to me. Dress looks like Batak work to me too, though I wld say I'm also seeing a lot of newish looking Batak weapons these days with black(ened) wood sheath, silver work (including flattened "fish egg" or wire filigree work, and black rusted blades. So there could be people in the Batak region doing new work. But again, that's my doubt on the dress. The blade does not look new, unless of course the "keris factories" today have reached new heights in creating that natural aged look (hope not!!).