Hi Tim,
You got a beautiful piha kaetta, from Sri-Lanka. I saw one on ebay a wek ago going for about 40GBP, mis-labelled, but most of the blade had been broken off - I let it go. After Jens indicated that very high quality wootz was traded from Sri-Lanka, I wonder whether these knives indeed have wootx blades. Could you give it an etch and see?
Check out this collection:
http://www.pihakaetta.com/gallery.php
Emanuel