Thanks Ian,
The blade is thin indeed, only 2 mm wide at the spine. Here is another small dagger of approximately the same size, which I guess would be classified as a gunong with a thicker blade. I believe this second one is from the 1950s or later based on the fittings which to me seem as made of alluminum.
Just wanted to learn a bit more about those two items, as I do not know that much about PI weapons (which fascinate me nevertheless).
Thanks,
Teodor