Sorry for joining the party that late...
Congrats Jose - I'm very glad you got this spectacular kris to mellow the sorrow earlier this year!
While Jose's kris is very, very similar to Datu Pinang's shown on the well-known pic, I'm sure it's not the same piece: There are several differences in details - most obviously seen in the okir of the wing; also the ring closest to the blade seem to be differently ornamented. You can most easily verify if you check the holes/windows of the open-worked okir along the edge of the wing starting from the curly tip: it goes small-large-small vs. large-small-large. Despite the limited resolution of the Datu Pinang pic, there are some more okir details that are different. It would still be very interesting to hear wether there is any wear detectable that would indicate a similar strap construction.
I agree that the placement of the rings is kinda odd. However, pushing the last ring further toward the pommel into a similar position as shown on the historic pic, would pretty much kill the flow of lines of a major part of the okir work. Not that hiding stuff and breaking the rhythm is something unheard of in this culture but still...
This find really did clear up many questions I had been mulling over when looking at that pic of Datu Pinang's kris again and again - kudos to Jose for sharing his treasure!
Best wishes,
Kai