Salaams ~ Note to Forum.
In order to focus on the possibility of Portuguese Sri Lankan 15th 16th and 17th Century sword making style it is possible, looking at the Kastane style, that some influence is there from the Jineta design. The apparent finger ring / turned down quillons may be a direct take off in that regard though they seem only decorative. Certainly lavish decorated quillons would add to the weapon being adopted in the role as a court sword rather than a fighting weapon. This is unclear. The problem being that blade length varied enormously.
Could some have been court sword and others weapons?
Ibrahiim al Balooshi.
Note; See # 10 on http://www.vikingsword.com/vb/showthread.php?t=6768