I think if you clean of the old patina with a sanding block or steel wool you'll probably see the flats that were filed. One exception to what you said is that I don't think "most" doubles have space or land between the barrels unless they've been cut. Most that I've seen are touching even though not usually filed flat as yours are. Having actual space between the muzzles is usually a sign they've been cut(shortened).

> Jim Legg <