Fearn, if you look at the very bottom of the initial post you will see that the photos were not added for a couple of hours after the first posting. The first respondents did not, indeed, see the pics before posting. I think we all see the keris outline in the x-rays now.
Bill, a keris sundang is a very particular type of keris and i don't think this is one. While the linked article states they believe the ship was Portuguese, i see no mention of a PI origin there. Where are you getting this reference from?
Empu Kumis makes a good point that we don't really know exactly what the dress on really early keris looked liked. Rattan wrap wrongko may have been all the rage in Jawa at the time.
Also, i'm not sure finding this blade aboard is necessarily evidence that a Malay salior was onboard. This keris could very well have been collected by a Portuguese salior as a keepsake or prize.