Just a passing comment:
Peurawot, as its name suggests, was essentially used for carving/forming (hence the variation in blade-shape and size).
As for its use as a pinang cutter: I would suggest, more as a shaver, to which it would lend itself (in the absence of an implement specifically for that purpose).
It should not be confused with badik/rencong -type implements, which were designed for a different purpose.
Examination of the blade and handle should be a determining factor.