Hi Chris,
Great to hear your thoughts on these. Looking back on a few examples you are of course right.
The patterns seen on triple fuller or single fuller blades is different - and not the "chain" motif.
Just to illustrate - a little image from a takouba/kaskara blade (hope Wolf doesn't mind me using it
) and a flat croc kaskara I used to own.
I recall the same construction issues with a couple of knives that came with the aforementioned croc kaskara, can't recall if the kaskara itself lacked the hilt pin.