Salaam ya Ibrahim!
I corresponded with Ibrahim about the sword pictured by Michael Blalock awhile back; we reached the same conclusion. It was offered by Auctions Imperial in the 2013 sale, here is a link to the description:
http://www.auctionflex.com/showlot.a...enum=5&lang=En
The blade is broad and well-tempered. While it showed some flexibility due to its relative flatness, it isn't particularly so.
Other than a very basic form from the same early Arab swords which influenced the Omani kattara, i.e. a simple, symmetrical, cylindrical grip with expanded pommel and straight, double-edged blade, I see no evidence for these swords being Arab at all. There was an example on display in the Victoria & Albert Museum when I visited there in the mid-90s, which was also of this form. It was mounted in silver, and the scabbard was done in black and red leather. It was labeled rather generically as an Islamic sword, I believe. Unfortunately, it isn't pictured in Anthony North's book.