The Witcher's Steel Blade is one of the steel swords that Geralt receives at the beginning of the game, during the prologue (the very first being a rusty sword). Alhough it is used primarily against humans and has little effect on monsters, Geralt is able to fight off most monsters during the early stages of the game using only this sword. In the prologue, Vesemir mentioned they have good cold steel. Made of meteorite metal, the metal from a falling star, this sword is deadly against opponents resistant to silver like common monsters and evil people.
This sword is carried by elves and so is not usually found anywhere but in their remains. It is a steel sword used to fight humans. Ineffective against most monsters. Used in witcher combat styles. (I have not personally found this sword anywhere Game widow 11:39, 6 February 2009 (UTC))
Harvall can be found in Act II, or III in the swamp on a decomposing body on Wyvern Island (in the north central part of the Swamp). It is a much better blade that the default witcher's steel blade, so if you get it in Act II, keep it and sell the witcher's steel blade instead.
The rusty sword is the first weapon Geralt receives in the Prologue. These swords can be found in lots of remains of adversaries, but sometimes in containers, most commonly in the early Acts. In Act III, there is one on a corpse west of the Golem Burial Grounds.
No extra stats
Looks like the general two handed longsword model in very bad shape.