It seems I made a little fumble.
I have been putting together a file of images of Spanish late XVIIth to late XVIIIth hilts covered with two brass or silver cylindrical pieces. Sometimes they meet at the middle sometimes they dont. They used the same kind on knifes up to the end of XIXth century
I also remembered a lion head saber, at the Luis Calvo chapter on early Spanish c1700 dragoon swords (bottom right). So called Washington Spanish swords, bottom left.
http://www.catalogacionarmas.com/public/48-DragS.pdf
So I saw this saber and I won it.
Now I know it is actually a Swiss saber. Spain never had Swiss mercenary cavalry. I still have to research French units in the Spanish sucession war.
Relevant threads:
http://www.vikingsword.com/vb/showthread.php?t=20946
http://www.vikingsword.com/vb/showthread.php?t=27896
http://www.vikingsword.com/vb/showthread.php?t=18464