Alan,
I will not be home with my reference works (like Scott's work on how the Spaniards described the Philippines in the 16th C) for two weeks but here are several reference krisses, datings and most of the earlier discussion on this issue on this forum.
"archaic kris threads"
I would consider the early 19th C kris as archaic and those krisses that closely resemble an Indonesian keris as proto- or transitional kerisses.
Here is an example of a "proto-kris" that I would date as earlier than the one in my first post (next to a regular-sized Madura keris).
Michael