The old style Chestnut decks not only had the crowning, but were significantly undercut across the whole exposed edge, leaving about a 3/16" flat. The crowning usually extended over to how the gunnels were shaped, too, the whole being shaped to a nice gently rounded surface.
My first thoughts were that this is not a Huron. Doesn't look like any that I've seen and I've seen a lot. They look as described by Rod. The deck makes me think of old Chestnut, but the thwarts aren't right for that.