This is the socalled Spanish 1796 cavalry model which real existence is in doubt, and there is no documentary track. Many think they were mounted in the XIXth century with spare parts. Some people still debate if some of them at least could be real.
The blade comes from a before Toledo factory 1728 model, c1750-1760. The pommel could be from a late civilian cup hilt.
Best info is at Hoploteca. You can use the page translator.
There are two parts, the second has new advances.
http://hoploteca.blogspot.com/2014/0...delo-1796.html
http://hoploteca.blogspot.com/search...ipolog%C3%ADas
Regards.