Strange Mendak on Yogyakarta Keris

[Athanase]

Thank you everyone for your comment.
For the strong curves I can't comment because it is the only one of my Kriss with a blade like this one.

[A. G. Maisey]

The form of a wave (luk) is dependent upon the classification of the keris:- long, slow waves point towards one classification, short, deep waves point towards a different classification.

I've used the word "classification" as a substitute for "tangguh", it doesn't mean "tangguh", but it is a more objective way of thinking about a blade.

See:-

http://www.kerisattosanaji.com/keristangguh.html