S**t I again inverted the terms Tajong and Coteng.
I have a Tajong type handle (recent) and indeed it is much more massive and decorated.
You're right Kai, the base of the handle is made from a different piece of wood. The separation is under the triangle frieze and we see that the lower part is less well sculpted than the upper part. This would explain the very rudimentary tin selut, the lower part would have been repaired locally by someone not specialized in wood and metalworking.
Thank you for your comments, it confirms what I thought, especially on the blade which seems to me not to be from the Malaysian peninsula.