Hi Andrew,
Thank you for chiming in.
One point of curiosity - the blade appears older than the fittings, and shows signs of use (not grandchild "abuse," mind you, but use)... Was it common to re-mount older blades as was commonly done with some keris? Also, if it had been made as a gift to present to the admiral, wouldn't one expect to see a commemorative inscription of some sort?
Regards,
Chris
ETA a photo of the blade tip below: