KIDONGKOL, KIROMPANG, NAGARUNCING

[David]

Originally Posted by Pangeran Datu

You're quite right of course. Tangguh can mean ACTUALLY from an era or MADE IN THE STYLE of that era.

ACTUALLY, i don't believe this is correct. A new blade "MADE IN THE STYLE" of, say, a Mataram or Tuban, does NOT have the tunggah of those periods. It is merely "made in the style of".
Tangguh is also not a system that is meant to be applied to all keris or even all Javanese keris. It is often misused in this sense as it can really only be properly applied to blades of kraton quality.