It is what is called a "Hand and a half" sword.
There are one handed swords and two handed swords, the idea here is that it can be wielded with one had but there is enough room on the grip for the user the gain additional force from his other hand. It weighs 3.5 lbs and is 47" overall with a blade of 37.5".
I dated this example to 1520 +/- but you can see a similar one in this famous Durer drawing dated 1498.
The pommel is referred to as "writhen" ie writhing. Twisted, in knots.
With things like this finding something that is "untouched" from it's birth is unlikely. Often pieces are replaced, blades are remounted (as is so often the case with Japanese swords). My sense is that the pieces are in fact contemporaneous, the style of the finials (on the ends of the cross guard) are of a piece with the pommel. It all "fits" so to speak. I think that there is a good chance that the leather grip is "of the period" too. One could get a carbon dating but that avenue is also fraught.
There is a story of one of the giants of the arms and armour (he was a brit) area finding what he thought was dried blood under a grip. He had it "tested" with nebulous results. Today, we'd know. Such an investigation does not seem far fetched.
The blade is marked "Andrea Ferrara". There is a bit at Wiki on him but I think it is wrong. Ferrara was a bladesmith of some repute, evidentually. So much so that other makers appropriated his name to, originally, deceive but later to add cachet. And still later, I suspect, as sort of a genuflection whose original purpose was lost. You see the name on a wide variety of blades.
Finally, there is the engraving of the Passau Wolf, another image of questionable value insofar as identifying a point of origin of the sword.
Wiki is useful for this:
So bottom line Hand and a half sword, German ca. 1520.During the Renaissance and early modern period, Passau was one of the most prolific centres of sword and bladed weapon manufacture in Germany (after Solingen). Passau smiths stamped their blades with the Passau wolf, usually a rather simplified rendering of the wolf on the city's coat-of-arms. Superstitious warriors believed that the Passau wolf conferred invulnerability on the blade's bearer, and thus Passau swords acquired a great premium. According to the Donau-Zeitung, aside from the wolf, some cabalistic signs and inscriptions were added. As a result, the whole practice of placing magical charms on swords to protect the wearers came to be known for a time as "Passau art". (See Eduard Wagner, Cut and Thrust Weapons, 1969.) Other cities' smiths, including those of Solingen, recognized the marketing value of the Passau wolf and adopted it for themselves. By the 17th century, Solingen was producing more wolf-stamped blades than Passau was.