Bali keris with inscriptions / inlays

[A. G. Maisey]

Don't forget Lombok, and East Coast Jawa too, in both these areas Balinese keris are pretty common.

Then we have Madura, and there was a trend in Madura towards Bali style going back to around the time of PBII.

Bali style does not necessarily always mean Bali origin.