Nathaniel, Thanks for the info.
Lew, I actually have no knowledge whatsoever on the shape or anything about these swords. Maybe, I didn't look enough, but I didn't found any information on these swords as how they made it to the museum etc.
With so many funny informations and "facts" around, I don't know if these swords can be positively, undeniably verified to be the prophet's sword. But, again, I didn't take much effort researching.