Fabrice, as i said in the first post of my thread, the sabre 'appeared to be' what i described; i knew nothing about these swords. Indeed the only wrong detail was that of the 1st Empire period. However i took notice that such was soon corrected to a (circa) 1830 dating, by corrado26 in post #2 and also by some direct qualified information, confirming its authenticity and production period; reason why i didn't digest the reproduction attribution.
The painting by Gérôme was just an 'en passant'; what does really impress me is the portrait of Ismaël, done in 1805; we can clearly see a suspension ring down by the middle of the scabbard.
By the way Fabrice, how wide is the range of "arrangements" or "customizations" in point
1. of your classification; does it include atypical European blades?
In other words, you have solid information on the 1806-1809 productions but, what evidence do you have that yours is a pre-1806 example ?
Just asking ... don't take it wrong

.