Hi Fernando,
Seems like it could be used for many different purposes. Certainly a good quality, fancy little knife for someone with money to spend: fancy hilt, nice stamped blade, nice old leather sheath.
Three main thoughts:
- A small utility knife to be worn under a belt or sash
- A concealed knife for a woman
- An assassin's concealed weapon/boot knife
Even short blades like this one can be lethal weapons in the right hands.
Where do you think it is from?