You might like to visit the Neka Museum in Bali if you get the opportunity, this place is a general art museum, with a couple of galleries filled with keris, some are modern art keris, many of which are of very high quality, here is a sample:-
http://www.kerisattosanaji.com/neka-page-1
in the left hand gallery at the top of the stairs you will find a collection of genuinely old keris, which is very valuable to collectors to provide a real life example of what genuine old Bali keris really looked like.
Here is a link to the website:-
https://nekaartmuseum.com/
A visit to the Bali Provincial State Museum in Den Pasar is also worth a visit, here is a sample:-
http://www.kerisattosanaji.com/den-pasar-museum-p-1