Oh... Ria
, try to ask to Bambang Irian. Order him to go to Kediri, Madiun, Malang, Sumenep (East Java) or Jogja in order to know how the blacksmith make it. So, beware if you said that your keris called Jalak Buda. It can be just Putran.
Although I just look by photos, but I was trying to understanding about the Iron, Pasikutan ........ and Chi (he..he..). My conclusion, your keris just a putran. The iron diffrent between real old keris buda with yours. The keris buda have a hard iron wave with the unripe iron. But your iron keriss look so ripe with more modern technique metal handiwork. So, the raw your keris can be made from old keris.
.... But, I more like with DhenTal opinion about kerisses..., so to the point
