Charles, this is one of the most superb kaskara's I have seen in a very long time! I was going to look into it and write on it tomorrow, but it was far too compelling to leave alone.
This is an excellent example of a Darfur sa'if (kaskara) which has seen a long life and the blade is I believe European, it would seem early to mid 19th century if not earlier. It is clear this has been refurbished probably numerous times, and the scabbard is of course much more recent. I would say this is a heirloom blade, and was probably handed down generations, the hilt is put together in working elements, with leather grip cover stitched and the heavy discoid pommel typical of Darfur hilts, as is the puffed cord ball at upper grip.
I reviewed the article by Graham Reed ("Kaskara from Northern Darfur, Sudan" Journal of the Arms and Armour Society, Vol.XII, #3, March, 1987,pp.165-201) and found a similar sword well discussed.
On p.170 it is noted that a sword with wide fuller running the entire length was apparantly in a leather shop receiving treatment probably not unlike this example with new scabbard, and noted by Mr. Reed in his travels there in these regions. This belonged to a well to do member of the Zaghawa tribe who had migrated to southern Darfur due to drought conditions.
The blade was etched on both sides with a snake (probably a python =assalla) and stars combination as well as a Lohr. A Lohr is a wooden board used by religious scribes on which texts from the Koran are written. In addition to these elements of motif, which are of course very much like the example you have posted, this was noted about the Lohr:
"...the Lohr is headed by a crescent moon within a circle. This may be an accurate representation of an astronomical event known quaintly as the 'old moon in the new moons arms' where the dark side of the moon becomes faintly visible due to reflected light from the earth at the time of the new moon".
Apparantly, it is noted, that older men living in countryside often carry thier kaskara when travelling. Years ago I was told by a Fur tribesman that I knew for a short while, that in his younger years, many of the elders kept thier treasured kaskaras mounted proudly on wall, and they were often worn. He also noted the totemic value of the crocodile hide typically mounted on these, and certainly the snake is represented in similar capacity. The rest of the motif may be floral ? or some reference to astronomical events or symbolism, possibly the inscription might offer more on metaphor present.
It is noted also in the article that the pommels are often leather covered, and that the X type cross typically seen on the guard of Darfur examples is also absent from many of these.
Absolutely beautiful, and important example Charles!!!
All the best,
Jim
Now I can get some sleep!!