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;
http://www.vikingsword.com/vb/showthread.php?t=765
Different Designs. 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.
See
https://3kberlin.de/2015/ein-piha-kaetta/ for details...