Will give it my 'go'; not a bad buy would my humble opinion be. The pommel does look like ivory (think too thick mass to be bone) and so white because its 'bleached' by sun n age (and not being handled much). Am wondering what kind of ivory.
Blade may indeed be bit on the simple side, but one cant have it all on one piece, can we?! To my opinion not specifically an early piece as than they would not have used so much silver/metalwork on the sheath (the more early, the rarer metal/silver).
<for betelnut one rather need a more hacking sort of blade as these nuts are hard to crack. Dagger has little use with them>
All in all a nice honest little gunong with a ivory pommel. Sometimes small can also be a plus! Congratulations I would say!
Buy two more and you'l have a collection of them . . .