[Ian]

Here is the daab/daav with a rounded tip and protrusion. I would say it is 19th C and for some time I thought it was Cambodian because of the pointed toe to the scabbard. More recently, I have come to look at it as perhaps Thai in origin. The fittings are solid silver and heavy.
.

And here is the one similar to Kroncke's example. This one has a round brass insert adjacent to the tip and is in a nice black lacquered scabbard. Pretty fancy for a "machete," but that is what I have been told this was used for. I would say this one is pre-1900 based on the condition of the blade and scabbard.
.