Just to add a bit. If we look closely, at the keris diagram in Keris Jawa book, we can see a small Dha formation on top of the thingil (term used in that book) as I mentioned in my first post above.
This reminds me of the greneng for a Tilam Sari keris which probably includes a dha formation on the thingil followed with a wide and long dha. Image below.
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