I've hunted out the original reference to the 'relic' Kattara below and found the owners description:
He says: A friend's father "pulled it out of the thatch of an old house back in the 1960's in Kildare. The sword has remained in his family since then."
It seems fair to assume that the sword was there for some considerable time to achieve this level of decay but it's age when abandoned is of course subject to debate.
My personal view would be that it was a 19thC Kattara (of Saif as you like to call them) brought back by some Irish soldier in the early part of the 20thC.
I use it as an example simply because it's state of disrepair reveals that imho it is a trade blade of the type often seen in Kaskara etc.
I would also say that it's origins were in Europe and that the multitude of these being exported in the 18th/19thC supported various 'final products' along the trade routes from Africa into the ME.
Funnily enough I know a dealer with one of the wide fullered trade blades mounted up in original configuration as a Victorian 'Medieval broadsword'.
Anyway, you are very welcome and thanks for sharing these interesting re-dressed Shamshir. Far more my cup of tea than kattara!