Hi Martin,
Thanks for posting your sword. That confirms my thoughts about where mine is from. Looks like a similar age even to your sword, although I have to say yours has a nicer fuller and is much nicer looking than mine.
The construction of the guard is identical on mine as well. So I think it certainly looks like mine should be from the same region.
I'm glad my guesses are getting better about locations!
I am always surprised how many beautiful and old takouba you have, please show more if you can!
Best,
Iain