Welcome to the forum Jazz. Very nice kris, especially for that money...however, i sincerely doubt it is older then late 19thC.
For some reason none of your close-ups appear, but the profile of this blade is nothing like the "archaic" kris from the 1700s.
The inlays look nice. As for the inscription, perhaps you could re-post your close-ups. Very doubtful it would be in Jawi though. The scale pattern is not one we haven't seen before and i am sure you will see a few posted by other forumites. I don't see anything particularly rare about the kakatau, but again i can't see the close-ups.
It certainly is a fine weapon and i would be excited to own it myself (especially at that price), but i am afraid it is not particularly odd or rare. Congrats on a great buy though.
