As a reminder to Forum the reason why I brought the detail to thread about the expulsion of Jews from Toledo and the Iberian peninsula was to point to their redistribution around the Mediterranean regions as one of the key source of transfer of design and possibly the influence on Nimcha style since as artisans and particularly sword makers ....and where as migrants to Ceylon they could have had some bearing on sword making in that sphere...but that it was really only a sketch in the margin for interest rather than a topic to change the threads direction.
The bigger blade seen at #321 is probably from the VOC often seen on late Kastane but as such it changes nothing in the general theory being discussed viz;
Thus by the simple method of comparison and detail presented herein; it can be seen that the Kastane is very much a home grown design from Buddhist and Hindu sources and not a European import. By the same proof there is no relationship except by accident of design between the Kastane and the Nimcha.