[VVV]

That's what I thought.
Below are my three Sumbawa sword variations.
Also I have enclosed a Sumbawa knife next to a well known Sumatran knife (the top one is Sumbawa).
I have of course seen more Sumbawa swords than those but none before with that kind of pronounced, sharp cut, parallell neck as those recently sold by that specific seller.
Maybe it's a local village variation or made by the same person considering they come from the same source?
On Indonesian knives however that kind of sharp cut neck could be found in different regions.

Michael