Salaams Dha Dha Thanks for posting those important pictures of old relics. Although no mention of the use of Kastane by Mudaliers ...The equivalent of the Civil Service Officers.. It is broadly accepted that the Kastane became a badge of office and not a weapon as such..and at roughly the time the Dutch came to rule.
You can see the wealth of detail in Forum Library at http://www.vikingsword.com/vb/showthread.php?t=18111
on the Kastane