I appreciate all the feedback. Bill, I am looking for its sister. It would be one with a twistcore blade!
Josh, I have noticed on trousse with this slender blade configuration almost always have a dip in the center of the blade. I don't know if they were made this way in preference of better or specific type of cutting or this was the natural area that would be sharpened again and again with use. If it is the latter it could indicate a long life.