To me this sword is not a Kaskara, likely "invented" in mid-19th C. The handle has none of the design elements of a kaskara. The cross guard is close and looks like those cast brass elements from Egypt most common on acid etched blades during the late Mahdist era. (I can't recall just now the name).
Don't know about the mark on the blade.
Design elements of the hilt are similar to ancient Islamic swords like the one in Askari Museum attached. (Sorry I can't extract an image of the grip to show. Maybe Tim can give me a hand.)
http://i1337.photobucket.com/albums/...ps489036f4.jpg
Regards,
Ed