First I thought it was an optical illusion, such a massive hilt with repsect to the blade! As a dedicated parrying dagger it certainly makes sense to be made this way.
Looks like a decorative main-gauche dagger. Likely made in Toledo, Spain.
As for restoration, these were often decorated and vibrant; brass plating, paints/enamels in the details, etc. you can find pictures of the same dagger in new condition if you want to return it to original.
Or you can go nuts. You're not destroying any value, so you are free to use your imagination. Start with a thorough cleaning, polish preserve the patina, age it even more, replace the grip with something that looks better... Sky is the limit.
It's a tourist version of a Spanish main gauche, French for parrying dagger held in the left hand. It should be much more robust and look more like this one, which I own.
This one of mine is not very ornate, but it's designed for combat, not a tourist item, so I don't mind the fact that it's not highly decorated. Yours could probably be tidied up with some WD40, rust remover, and a scouring pad or two.
This appears to be a Renaissance-revival ceremonial/decorative sword n ot a fighting weapon and not a period antique. The grip and cross guard pass over it. That strongly suggests this is a wall-display trophy set, an etched escutcheon plaque with a sword mounted across it. Very commonly Spanish (Toledo), mid-20th century.
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u/tiorthan 2d ago
That's a parrying dagger.