Hi Ibrahiim,
If you want to make that distinction (and I don't worry I understand why because of the functionality needed for the dance you commented on a lot previously
) there has to be a reason what you are terming African trade blades are showing up in Omani mounts and while I certainly don't have the cultural insight you have, I am a little lost then as to why, if the flexibility is so important, stiffer blades seem to have been used as well... Is the flexibility what makes the sword truly Omani in your opinion? Because judging from the examples I'm posting there seems to be no problem with Omanis using stiffer blades...
One thought that immediately strikes me is if the flexible blades are a local development from the stiffer general trade blades? And of course that was part of my point with the wolf marks, they are easy to copy and show clear European influence in some of these blades.
Just in case I never added this one earlier in the thread, here's another one that sold a while back at a Czech auction house.
http://www.antiq.cz/aukce/m-n/katalog6-98/en/528.html