Hi Chegru, thanks for clearing that up. :-)
I can't offer much more information, but you may find this thread good reading:
http://vikingsword.com/vb/showthread...hlight=kattara
Some similar swords can be seen on the last two pages of that thread.
They are certainly an interesting type with fairly strong evidence that the basic design dates back into the early days of Islam. How to date each specific example is of course much harder as the type obviously remained popular for more than a few centuries. It would seem a longer type of kattara, based around European trade blades gradually replaced the short sword.
All the best,
Iain