To broaden the style so far observed and to remind readers of detail already at Forum Library on this weapon...I place again here the Library detail. Viz;
I find it interesting that so many styles and sizes existed and in the case below so closely related to the Castane/Kastane as to suggest it was in this case virtually a Castane/Kastane Dagger...
Caveat to the below illustration
... The more I look at this the more I suggest that this is not a Piha Kaetta and that it has been rehilted with a Kastane hilt and with a replacement scabbard...and with a stylus with a wooden handle added. The blade may be a reworked Piha Keatta but the overall design looks concocted.