Nechesh, one of two keris Budha that Alan Maisey presents in his article is a good piece. Knaud keris is a good work from 1342AD, but Budha period, I think before 900AD, or VIII - IX Century. Knaud keris made at 1342AD, same with a Majapahit (in Jawa), so that, the keris (in Jawa) can be called Tangguh Majapahit, Jenggala, Dhaha, Segaluh etc, not Kabudhan.
Tangguh Kabudhan kerisses, more simple with no pamor and any carved or relieve.
I agree with Shakti that the keris Budha posted by Ria in Muzium Siber is a new made. If I look clooser, the iron in that keris have no fibrous, although it made with a kelengan iron (no pamor).
This is just my oppinion, maybe I have wrong, forgive me.
Regards,