Awesome piece, Fernando! I envy your location, as you always seem to turn up such great examples (still enjoying that 4lb cannonball you sold me
). From Lee's pics, I think it still could be Hispano-Roman. The examples shown swell a little more towards the mid-point, but yours definately has the same wedge shape near the end of the blade. This isn't my area, so I'll ask a dumb question as to whether later Roman knives possessed this unique blade shape such as yours? In any case, a great piece worthy of any collection.