Could you get some better pics of the blade?
A very nice podang indeed. I like the jian-like blade and the lamination is quite interesting. I wouldn't rule out an Indian origin for the blade. Straight, double-edged blades are not unknown there and I have seen many tulwar blades that were forged with a high carbon edge plate with pattern welded cheeks. So the forging technique is there also and we know India has had long time trading routes established with Sumatra.