[A. G. Maisey]

Just let me clarify that question Jean.

I think you are asking this:-

"How do we tell if a keris blade is either Javanese, or Balinese, if it dates from before 1500 ( the end of the 15th century)?"

The year 1500 is a nominal date, but Islam had already established a presence in Jawa well before this, and Majapahit had collapsed by 1525.

Bali began development of its present form during the Majapahit period, and following the collapse of Majapahit, with the influx of "Wong Jowo" who married into the existing population of Bali at all levels.

We cannot think of 15th century Bali in anything like the way in which we think of 19th century Bali.

How many Balinese made keris were there in Bali in the 15th century?

Were there any at all?

I don't know

Then of course we have the problem of identifying a keris that definitely comes from before 1500. In Jawa such a keris is referred to as a "Keris Buda", because the period before Islam is referred to as the "Buda" period.

Has a Keris Buda ever been found in Bali?

I know of none.

I don't think I can answer your question Jean.