I second (or third) everyone thanking you for posting these. Rarely seen authentically old and beautifully executed blades.
I wonder, Alan, if now that we have these blades on view for examination is you might have more to say about them since you had the opportunity to examine them closely and first-hand.
I suspect that the paint sheath has a strong Chinese influence from the choice of motifs.
I see that the gold sheathed keris is similar in dress to other Sumbawa keris, bit wonder if the origin of the blade itself might not be Jawa.