I was about to pin this saying the crossguard was good but the blade was stupid. Then I looked at what a flamberge is. ~ German or Swiss Two Handed Sword (Hand & a Half Sword) With Flamberge Blade Circa 1570 .
Officer of the Imperial Guard Grenadier Horse's sword. In any case it did belong to an Heavy Cavalry Officer from Napoléon Army, dated from October 1811 / Сабля офицера конногренадер гвардии Наполеона.
A rapier, manufactured in the century by the technology of the old masters as a gift to one high-ranking person. Such exceptionally flexible rapiers were made in Toledo in the beginning of century. They were sold in gun shops and coiled.
This is a nice visual glossary of all the fittings that a blade go into when creating a katana. I have studied kenjutsu and used katana’s for a number of years and never knew the proper names for all these parts.